| 
 1. 
 | 
 Abboud, 
  T.K., et al., Mini-dose intrathecal 
  morphine for the relief of post-cesarean section pain: Safety, efficacy, and 
  ventilatory responses to carbon dioxide. Anesthesia and Analgesia, 1988. 67(2): p. 137-143. 
 | 
| 
 2. 
 | 
 Abboud, 
  T.K., et al. Epidural butorphanol or 
  morphine for the relief of post-cesarean section pain: ventilatory responses 
  to carbon dioxide. Anesthesia and Analgesia, 1987. 887-93. 
 | 
| 
 3. 
 | 
 Abboud, 
  T.K., et al., Transnasal butorphanol: A 
  new method for pain relief in post-cesarean section pain. Acta 
  Anaesthesiologica Scandinavica, 1991. 35(1): 
  p. 14-18. 
 | 
| 
 4. 
 | 
 Abouleish, 
  E., et al., Combined intrathecal 
  morphine and bupivacaine for cesarean section. Anesthesia and Analgesia, 
  1988. 67(4): p. 370-4. 
 | 
| 
 5. 
 | 
 Abuelghar, 
  W.M., G. El-Bishry, and L.H. Emam, Caesarean 
  deliveries by Pfannenstiel versus Joel-Cohen incision: A randomised 
  controlled trial. Journal of the Turkish German Gynecology Association, 
  2013. 14(4): p. 194-200. 
 | 
| 
 6. 
 | 
 Ackerman, 
  W.E., et al., A comparison of the 
  incidence of pruritus following epidural opioid administration in the 
  parturient. Canadian Journal of Anaesthesia, 1989. 36(4): p. 388-391. 
 | 
| 
 7. 
 | 
 Afolabi 
  Bosede, B. and E.A. Lesi Foluso, Regional 
  versus general anaesthesia for caesarean section. Cochrane Database of 
  Systematic Reviews, 2012.  DOI: 
  10.1002/14651858.CD004350.pub3. 
 | 
| 
 8. 
 | 
 Agarwal, 
  K., et al., Comparative analgesic efficacy 
  of buprenorphine or clonidine with bupivacaine in the caesarean section. 
  Indian Journal of Anaesthesia, 2010. 54(5): 
  p. 453-457. 
 | 
| 
 9. 
 | 
 Alhashemi, 
  J.A., et al., Intravenous acetaminophen 
  vs oral ibuprofen in combination with morphine PCIA after Cesarean delivery. 
  Canadian Journal of Anesthesia, 2006. 53(12): 
  p. 1200-1206. 
 | 
| 
 10. 
 | 
 Altinbas, 
  S.K., et al., Parietal peritoneal 
  closure versus non-closure at caesarean section: which technique is feasible 
  to perform? J Matern Fetal Neonatal Med, 2013. 26(11): p. 1128-31. 
 | 
| 
 11. 
 | 
 Al-Waili, 
  N.S., Efficacy and safety of repeated 
  postoperative administration of intramuscular diclofenac sodium in the 
  treatment of post-cesarean section pain: a double-blind study. Archives 
  of Medical Research, 2001. 148-54. 
 | 
| 
 12. 
 | 
 Angle, 
  P.J., et al., A randomized controlled 
  trial examining the effect of naproxen on analgesia during the second day 
  after cesarean delivery. Anesthesia and Analgesia, 2002. 95(3): p. 741-745. 
 | 
| 
 13. 
 | 
 Bamigboye, 
  A.A. and G.J. Hofmeyr, Closure versus 
  non-closure of the peritoneum at caesarean section. Cochrane Database 
  Syst Rev, 2003(4): p. Cd000163. 
 | 
| 
 14. 
 | 
 Bamigboye, 
  A.A. and G.J. Hofmeyr, Local 
  anaesthetic wound infiltration and abdominal nerves block during caesarean 
  section for postoperative pain relief. Cochrane database of systematic 
  reviews (Online), 2009(3): p. CD006954. 
 | 
| 
 15. 
 | 
 Bansal, 
  A., et al., Comparison of epidural 
  butorphanol and sufentanil for post- caesarean section analgesia. Journal 
  of Anaesthesiology Clinical Pharmacology, 2009. 25(4): p. 473-476. 
 | 
| 
 16. 
 | 
 Barkshire, 
  K., et al., A comparison of 
  bupivacaine-fentanyl-morphine with bupivacaine-fentanyl-diamorphine for 
  caesarean section under spinal anaesthesia. International Journal of 
  Obstetric Anesthesia, 2001. 10(1): 
  p. 4-10. 
 | 
| 
 17. 
 | 
 Bauchat, 
  J.R., et al., Low-dose ketamine with 
  multimodal postcesarean delivery analgesia: A randomized controlled trial. 
  International Journal of Obstetric Anesthesia, 2011. 20(1): p. 3-9. 
 | 
| 
 18. 
 | 
 Behdad, 
  S., et al., Comparison of postoperative 
  analgesic effect of tramadol and bupivacaine subcutaneous infiltration in patients 
  undergoing cesarean section. Acta Clinica Croatica, 2013. 52(1): p. 93-98. 
 | 
| 
 19. 
 | 
 Benhamou, 
  D., et al., Intrathecal clonidine and 
  fentanyl with hyperbaric bupivacaine improves analgesia during cesarean 
  section. Anesthesia and Analgesia, 1998. 87(3): p. 609-613. 
 | 
| 
 20. 
 | 
 Bilgen, 
  S., et al., Effect of three different 
  doses of ketamine prior to general anaesthesia on postoperative pain 
  following caesarean delivery: A prospective randomized study. Minerva 
  Anestesiologica, 2012. 78(4): p. 
  442-449. 
 | 
| 
 21. 
 | 
 Binder, 
  P., et al., Hi-TENS combined with 
  PCA-morphine as post caesarean pain relief. Midwifery, 2011. 27(4): p. 547-552. 
 | 
| 
 22. 
 | 
 Binsted, 
  R.J., Epidural morphine after caesarean 
  section. Anaesthesia and Intensive Care, 1983. 11(2): p. 130-134. 
 | 
| 
 23. 
 | 
 Blanco, 
  J., et al. Epidural analgesia for 
  post-caesarean pain relief: a comparison between morphine and fentanyl. 
  European Journal of Anaesthesiology, 1987. 395-9. 
 | 
| 
 24. 
 | 
 Bonnet, 
  M.P., et al., Analgesic efficacy and 
  adverse effects of epidural morphine compared to parenteral opioids after 
  elective caesarean section: A systematic review. European Journal of 
  Pain, 2010. 14(9): p. 
  894.e1-894.e9. 
 | 
| 
 25. 
 | 
 Buggy, 
  D.J., et al., Motor block during 
  patient-controlled epidural analgesia with ropivacaine or 
  ropivacaine/fentanyl after intrathecal bupivacaine for Caesarean section. 
  British Journal of Anaesthesia, 2000. 85(3): 
  p. 468-470. 
 | 
| 
 26. 
 | 
 Bunting, 
  P. and I. McConachie, Ilioinguinal 
  nerve blockade for analgesia after caesarean section. Br J Anaesth, 1988. 
  61(6): p. 773-5. 
 | 
| 
 27. 
 | 
 Camann, 
  W.R., et al., Does epidural 
  administration of butorphanol offer any clinical advantage over the 
  intravenous route? A double-blind, placebo-controlled trial. 
  Anesthesiology, 1992. 76(2): p. 
  216-220. 
 | 
| 
 28. 
 | 
 Caranza, 
  R., I. Teyapalan, and D.J. Buggy, Central 
  neuraxial opioid analgesia after caesarean section: Comparison of epidural 
  diamorphine and intrathecal morphine. International Journal of Obstetric 
  Anesthesia, 1999. 8(2): p. 90-93. 
 | 
| 
 29. 
 | 
 Cardoso, 
  M.M., et al., Effect of dexamethasone 
  on prevention of postoperative nausea, vomiting and pain after caesarean 
  section: a randomised, placebo-controlled, double-blind trial. European Journal 
  of Anaesthesiology, 2013. 30(3): 
  p. 102-5. 
 | 
| 
 30. 
 | 
 Cardoso, 
  M.M.S.C., et al., Small doses of 
  intrathecal morphine combined with systemic diclofenac for postoperative pain 
  control after cesarean delivery. Anesthesia and Analgesia, 1998. 86(3): p. 538-541. 
 | 
| 
 31. 
 | 
 Carvalho, 
  B., et al., Valdecoxib for 
  postoperative pain management after cesarean delivery: A randomized, 
  double-blind, placebo-controlled study. Anesthesia and Analgesia, 2006. 103(3): p. 664-670. 
 | 
| 
 32. 
 | 
 Carvalho, 
  B., et al., Continuous subcutaneous 
  instillation of bupivacaine compared to saline reduces interleukin 10 and 
  increases substance P in surgical wounds after cesarean delivery. Anesth 
  Analg, 2010. 111(6): p. 1452-9. 
 | 
| 
 33. 
 | 
 Carvalho, 
  B., et al., Intrathecal fentanyl added 
  to bupivacaine and morphine for cesarean delivery may induce a subtle acute 
  opioid tolerance. Int J Obstet Anesth, 2012. 21(1): p. 29-34. 
 | 
| 
 34. 
 | 
 Carvalho, 
  B., et al., Postoperative subcutaneous 
  instillation of low-dose ketorolac but not hydromorphone reduces wound 
  exudate concentrations of interleukin-6 and interleukin-10 and improves 
  analgesia following cesarean delivery. Journal of Pain, 2013. 14(1): p. 48-56. 
 | 
| 
 35. 
 | 
 Chen, 
  L.K., et al., Patient -controlled 
  epidural ropivacaine as a post-Cesarean analgesia: Acomparison with epidural 
  morphine. Taiwanese Journal of Obstetrics and Gynecology, 2011. 50(4): p. 441-446. 
 | 
| 
 36. 
 | 
 Choi, 
  D.M.A., A.P. Kliffer, and M.J. Douglas, Dextromethorphan 
  and intrathecal morphine for analgesia after Caesarean section under spinal 
  anaesthesia. British Journal of Anaesthesia, 2003. 90(5): p. 653-658. 
 | 
| 
 37. 
 | 
 Chung, 
  C.J., et al., The efficacy of 
  intrathecal neostigmine, intrathecal morphine, and their combination for 
  post-cesarean section analgesia. Anesthesia and Analgesia, 1998. 87(2): p. 341-346. 
 | 
| 
 38. 
 | 
 Cohen, 
  S., et al., The primary action of 
  epidural fentanyl after cesarean delivery is via a spinal mechanism. 
  Anesthesia and Analgesia, 2002. 94(3): 
  p. 674-679. 
 | 
| 
 39. 
 | 
 Cohen, 
  S.E., et al., Ketorolac and spinal 
  morphine for postcesarean analgesia. International Journal of Obstetric 
  Anesthesia, 1996. 5(1): p. 14-18. 
 | 
| 
 40. 
 | 
 Cohen, 
  S.E. and W.A. Woods, The role of 
  epidural morphine in the postcesarean patient: efficacy and effects on 
  bonding. Anesthesiology, 1983. 58(6): 
  p. 500-504. 
 | 
| 
 41. 
 | 
 Cooper, 
  D.W., D.M. Ryall, and W.R. Desira, Extradural 
  fentanyl for postoperative analgesia: Predominant spinal or systemic action? 
  British Journal of Anaesthesia, 1995. 74(2): 
  p. 184-187. 
 | 
| 
 42. 
 | 
 Cooper, 
  D.W., et al., Patient-controlled 
  extradural analgesia with bupivacaine, fentanyl, or a mixture of both, after 
  Caesarean section. British Journal of Anaesthesia, 1996. 76(5): p. 611-615. 
 | 
| 
 43. 
 | 
 Cooper, 
  D.W., et al., Patient-controlled 
  analgesia: Epidural fentanyl and i.v. morphine compared after Caesarean 
  section. British Journal of Anaesthesia, 1999. 82(3): p. 366-370. 
 | 
| 
 44. 
 | 
 Culebras, 
  X., et al., Advantages of intrathecal 
  nalbuphine, compared with intrathecal morphine, after cesarean delivery: An 
  evaluation of postoperative analgesia and adverse effects. Anesthesia and 
  Analgesia, 2000. 91(3): p. 
  601-605. 
 | 
| 
 45. 
 | 
 Dahl, V., 
  et al., High-dose diclofenac for 
  postoperative analgesia after elective caesarean section in regional 
  anaesthesia. International Journal of Obstetric Anesthesia, 2002. 11(2): p. 91-94. 
 | 
| 
 46. 
 | 
 Daley, 
  M.D., et al., A comparison of epidural 
  and intramuscular morphine in patients following cesarean section. 
  Anesthesiology, 1990. 72(2): p. 
  289-294. 
 | 
| 
 47. 
 | 
 Davies, 
  S.J., et al., Maternal experience 
  during epidural or combined spinal-epidural anesthesia for cesarean section: 
  A prospective, randomized trial. Anesthesia and Analgesia, 1997. 85(3): p. 607-613. 
 | 
| 
 48. 
 | 
 Davis, 
  K.M., M.A. Esposito, and B.A. Meyer, Oral 
  analgesia compared with intravenous patient-controlled analgesia for pain 
  after cesarean delivery: A randomized controlled trial. American Journal 
  of Obstetrics and Gynecology, 2006. 194(4): 
  p. 967-971. 
 | 
| 
 49. 
 | 
 Demiraran, 
  Y., et al., Tramadol and 
  levobupivacaine wound infiltration at Cesarean delivery for postoperative 
  analgesia. Journal of Anesthesia, 2013. 27(2): p. 175-179. 
 | 
| 
 50. 
 | 
 Dieterich, 
  M., et al., Pain management after 
  cesarean: a randomized controlled trial of oxycodone versus intravenous 
  piritramide. Archives of gynecology and obstetrics, 2012. 286(4): p. 859-865. 
 | 
| 
 51. 
 | 
 Dodd, 
  J.M., E.R. Anderson, and S. Gates, Surgical 
  techniques for uterine incision and uterine closure at the time of caesarean 
  section. Cochrane database of systematic reviews (Online), 2008(3): p. 
  CD004732. 
 | 
| 
 52. 
 | 
 Dottrens, 
  M., K. Rifat, and D.R. Morel, Comparison 
  of extradural administration of sufentanil, morphine and sufentanil-morphine 
  combination after Caesarean section. British Journal of Anaesthesia, 
  1992. 69(1): p. 9-12. 
 | 
| 
 53. 
 | 
 Draisci, 
  G., et al., Safety and effectiveness of 
  coadministration of intrathecal sufentanil and morphine in hyperbaric 
  bupivacaine-based spinal anesthesia for cesarean section. Journal of 
  Opioid Management, 2009. 5(4): p. 
  197-202. 
 | 
| 
 54. 
 | 
 Duale, 
  C., et al., Epidural versus intrathecal 
  morphine for postoperative analgesia after Caesarean section. British Journal 
  of Anaesthesia, 2003. 91(5): p. 
  690-694. 
 | 
| 
 55. 
 | 
 Eisenach, 
  J.C., et al., An isobolographic study 
  of epidural clonidine and fentanyl after cesarean section. Anesthesia and 
  Analgesia, 1994. 79(2): p. 
  285-290. 
 | 
| 
 56. 
 | 
 Eslamian, 
  L., et al., Transversus abdominis plane 
  block reduces postoperative pain intensity and analgesic consumption in 
  elective cesarean delivery under general anesthesia. Journal of 
  Anesthesia, 2012. 26(3): p. 
  334-338. 
 | 
| 
 57. 
 | 
 Filos, 
  K.S., et al., Intrathecal clonidine as 
  a sole analgesic for pain relief after cesarean section. Anesthesiology, 
  1992. 77(2): p. 267-74. 
 | 
| 
 58. 
 | 
 Filos, 
  K.S., et al., Hemodynamic and analgesic 
  profile after intrathecal clonidine in humans: A dose-response study. 
  Anesthesiology, 1994. 81(3): p. 
  591-601. 
 | 
| 
 59. 
 | 
 Fouladi, 
  R.F., N. Navali, and A. Abbassi, Pre-incisional, 
  post-incisional and combined pre-and post-incisional local wound 
  infiltrations with lidocaine in elective caesarean section delivery: A 
  randomised clinical trial. Journal of Obstetrics and Gynaecology, 2013. 33(1): p. 54-59. 
 | 
| 
 60. 
 | 
 Fredman, 
  B., et al., The analgesic efficacy of 
  patient-controlled ropivacaine instillation after Cesarean delivery. 
  Anesthesia and Analgesia, 2000. 91(6): 
  p. 1436-40. 
 | 
| 
 61. 
 | 
 Fusco, 
  P., et al., Transversus abdominis plane 
  block for analgesia after cesarean delivery. A systematic review. Minerva 
  Anestesiologica, 2014. 
 | 
| 
 62. 
 | 
 Ghazi-Saidi, 
  K. and A. Hajipour, Effects of 
  preemptive ketamine on post-cesarean analgesic requirement. Acta Medica 
  Iranica, 2002. 40(2): p. 100-103. 
 | 
| 
 63. 
 | 
 Gin, T., 
  et al., Analgesia after caesarean 
  section with intramuscular ketorolac or pethidine. Anaesthesia and 
  Intensive Care, 1993. 21(4): p. 
  420-423. 
 | 
| 
 64. 
 | 
 Girgin, 
  N.K., et al., Intrathecal morphine in 
  anesthesia for cesarean delivery: dose-response relationship for combinations 
  of low-dose intrathecal morphine and spinal bupivacaine. Journal of 
  Clinical Anesthesia, 2008. 20(3): 
  p. 180-185. 
 | 
| 
 65. 
 | 
 Grass, 
  J.A., et al., Patient-controlled 
  analgesia after cesarean delivery: Epidural sufentanil versus intravenous 
  morphine. Regional Anesthesia, 1994. 19(2): 
  p. 90-97. 
 | 
| 
 66. 
 | 
 Han, 
  S.Y., et al., The effect of low-dose ketamine 
  on post-caesarean delivery analgesia after spinal anesthesia. Korean J 
  Pain, 2013. 26(3): p. 270-6. 
 | 
| 
 67. 
 | 
 Hofmeyr, 
  G.J., et al., Techniques for caesarean 
  section. Cochrane database of systematic reviews (Online), 2008(1): p. 
  CD004662. 
 | 
| 
 68. 
 | 
 Kainu, 
  J.P., et al., Continuous wound infusion 
  with ropivacaine fails to provide adequate analgesia after caesarean section. 
  International Journal of Obstetric Anesthesia, 2012. 21(2): p. 119-124. 
 | 
| 
 69. 
 | 
 Karaman, 
  S., et al., Comparison of the maternal 
  and neonatal effects of epidural block and of combined spinal-epidural block 
  for Cesarean section. European Journal of Obstetrics Gynecology and 
  Reproductive Biology, 2005. 121(1): 
  p. 18-23. 
 | 
| 
 70. 
 | 
 Kayman-Kose, 
  S., et al., Transcutaneous electrical 
  nerve stimulation (TENS) for pain control after vaginal delivery and cesarean 
  section. The Journal of Maternal-Fetal and Neonatal Medicine, 2014. 
 | 
| 
 71. 
 | 
 Khezri, 
  M.B., J. Ghasemi, and N. Mohammadi, Evaluation 
  of the analgesic effect of ketamine as an additive to intrathecal bupivacaine 
  in patients undergoing cesarean section. Acta Anaesthesiologica 
  Taiwanica, 2013. 51(4): p. 
  155-160. 
 | 
| 
 72. 
 | 
 Lavand’homme, 
  P.M., et al., An evaluation of the 
  postoperative antihyperalgesic and analgesic effects of intrathecal clonidine 
  administered during elective cesarean delivery. Anesthesia and Analgesia, 
  2008. 107(3): p. 948-55. 
 | 
| 
 73. 
 | 
 Lew, E., 
  S.W. Yeo, and E. Thomas, Combined spinal-epidural 
  anesthesia using epidural volume extension leads to faster motor recovery 
  after eective cesarean delivery: A prospective, randomized, double-blind study. 
  Anesthesia and Analgesia, 2004. 98(3): 
  p. 810-814. 
 | 
| 
 74. 
 | 
 Lim, 
  N.L.S.H., et al., Single dose 
  diclofenac suppository reduces post-Cesarean PCEA requirements. Canadian 
  Journal of Anesthesia, 2001. 48(4): 
  p. 383-386. 
 | 
| 
 75. 
 | 
 Mackeen, 
  A.D., V. Berghella, and M.L. Larsen, Techniques 
  and materials for skin closure in caesarean section. Cochrane database of 
  systematic reviews (Online), 2012. 11: 
  p. CD003577. 
 | 
| 
 76. 
 | 
 Magnani, 
  E., et al., Postoperative analgesia 
  after cesarean section by continued administration of levobupivacaine with 
  the On-Q Painbuster system over the fascia vs ketorolac + morphine i.v. Clinical 
  and Experimental Obstetrics and Gynecology, 2006. 33(4): p. 223-5. 
 | 
| 
 77. 
 | 
 Marzida, 
  M., A randomized controlled study 
  comparing subcutaneous pethidine with oral diclofenac for pain relief after 
  caesarean section. Journal of the University of Malaya Medical Centre, 
  2009. 12(2): p. 63-69. 
 | 
| 
 78. 
 | 
 Mathai, 
  M., G.J. Hofmeyr, and N.E. Mathai, Abdominal 
  surgical incisions for caesarean section. Cochrane Database Syst Rev, 
  2013. 5: p. Cd004453. 
 | 
| 
 79. 
 | 
 McDonnell, 
  N.J., et al., A randomised comparison 
  of regular oral oxycodone and intrathecal morphine for post-caesarean 
  analgesia. International Journal of Obstetric Anesthesia, 2010. 19(1): p. 16-23. 
 | 
| 
 80. 
 | 
 McMorrow, 
  R.C., et al., Comparison of transversus 
  abdominis plane block vs spinal morphine for pain relief after Caesarean 
  section. British Journal of Anaesthesia, 2011. 106(5): p. 706-12. 
 | 
| 
 81. 
 | 
 Mendez, 
  R., J.C. Eisenach, and K. Kashtan, Epidural 
  clonidine analgesia after cesarean section. Anesthesiology, 1990. 73(5): p. 848-852. 
 | 
| 
 82. 
 | 
 Menkiti, 
  I.D., I. Desalu, and O.T. Kushimo, Low-dose 
  intravenous ketamine improves postoperative analgesia after caesarean 
  delivery with spinal bupivacaine in African parturients. International 
  Journal of Obstetric Anesthesia, 2012. 21(3): 
  p. 217-221. 
 | 
| 
 83. 
 | 
 Mikuni, 
  I., et al., Efficacy of intrathecal 
  morphine with epidural ropivacaine infusion for postcesarean analgesia. 
  Journal of Clinical Anesthesia, 2010. 22(4): 
  p. 268-273. 
 | 
| 
 84. 
 | 
 Milner, 
  A.R., D.G. Bogod, and R.J. Harwood, Intrathecal 
  administration of morphine for elective Caesarean section. A comparison 
  between 0.1 mg and 0.2 mg. Anaesthesia, 1996. 51(9): p. 871-873. 
 | 
| 
 85. 
 | 
 Moore, 
  A., et al., Gabapentin improves 
  postcesarean delivery pain management: a randomized, placebo-controlled 
  trial. Anesthesia and Analgesia, 2011. 112(1): p. 167-73. 
 | 
| 
 86. 
 | 
 Munishankar, 
  B., et al., A double-blind randomised 
  controlled trial of paracetamol, diclofenac or the combination for pain 
  relief after caesarean section. International Journal of Obstetric 
  Anesthesia, 2008. 17(1): p. 9-14. 
 | 
| 
 87. 
 | 
 Najafi 
  Anaraki, A. and K. Mirzaei, The effect 
  of gabapentin versus intrathecal fentanyl on postoperative pain and morphine 
  consumption in cesarean delivery: a prospective, randomized, double-blind 
  study. Archives of Gynecology and Obstetrics, 2014: p. 1-6. 
 | 
| 
 88. 
 | 
 Ng, K., 
  et al., Spinal versus epidural 
  anaesthesia for caesarean section. Cochrane database of systematic 
  reviews (Online), 2004(2): p. CD003765. 
 | 
| 
 89. 
 | 
 Ngan Kee, 
  W.D., et al., Comparison of 
  patient-controlled epidural analgesia with patient-controlled intravenous 
  analgesia using pethidine or fentanyl. Anaesthesia and Intensive Care, 
  1997. 25(2): p. 126-132. 
 | 
| 
 90. 
 | 
 Norman, 
  B.J. and S. Yentis, Analgesia produced 
  by epidural diamorphine is better following caesarean section under spinal 
  anaesthesia than under epidural anaesthesia. International Journal of 
  Obstetric Anesthesia, 1998. 7(2): 
  p. 98-102. 
 | 
| 
 91. 
 | 
 Olofsson, 
  C.I., et al., Diclofenac in the 
  treatment of pain after caesarean delivery: An opioid-saving strategy. 
  European Journal of Obstetrics Gynecology and Reproductive Biology, 2000. 88(2): p. 143-146. 
 | 
| 
 92. 
 | 
 Omar, 
  A.A.A. and K.A. al Issa, Intravenous 
  paracetamol (perfalgan) for analgesia after cesarean section: A double-blind 
  randomized controlled study. Rawal Medical Journal, 2011. 36(4). 
 | 
| 
 93. 
 | 
 O’Neill, 
  P., et al., Ropivacaine continuous 
  wound infusion versus epidural morphine for postoperative analgesia after 
  cesarean delivery: A randomized controlled trial. Anesthesia and 
  Analgesia, 2012. 114(1): p. 
  179-185. 
 | 
| 
 94. 
 | 
 Paech, 
  M.J., J.S. Moore, and S.F. Evans, Meperidine 
  for patient-controlled analgesia after cesarean section: Intravenous versus 
  epidural administration. Anesthesiology, 1994. 80(6): p. 1268-1276. 
 | 
| 
 95. 
 | 
 Paech, 
  M.J., et al. Postoperative intraspinal 
  opioid analgesia after caesarean section; a randomised comparison of 
  subarachnoid morphine and epidural pethidine. International Journal of 
  Obstetric Anesthesia, 2000. 238-45 DOI: 10.1054/ijoa.2000.0758. 
 | 
| 
 96. 
 | 
 Paech, 
  M.J., et al. Postcesarean analgesia 
  with spinal morphine, clonidine, or their combination. Anesthesia and 
  Analgesia, 2004. 1460-6, table of contents. 
 | 
| 
 97. 
 | 
 Paraskeva, 
  A., et al., Postoperative analgesic 
  requirements after subarachnoid or epidural anesthesia with ropivacaine 0.75 
  in cesarean section. A double-blind randomized trial. Current Medical 
  Research and Opinion, 2012. 28(9): 
  p. 1497-1504. 
 | 
| 
 98. 
 | 
 Pavy, 
  T.J.G., et al., Rectal indomethacin 
  potentiates spinal morphine analgesia after caesarean delivery. 
  Anaesthesia and Intensive Care, 1995. 23(5): 
  p. 555-559. 
 | 
| 
 99. 
 | 
 Pavy, 
  T.J.G., M.J. Paech, and S.F. Evans, The 
  effect of intravenous ketorolac on opioid requirement and pain after cesarean 
  delivery. Anesthesia and Analgesia, 2001. 92(4): p. 1010-1014. 
 | 
| 
 100. 
 | 
 Perriss, 
  B.W., B.V. Latham, and I.H. Wilson, Analgesia 
  following extradural and i.m. pethidine in post-caesarean section patients. 
  British Journal of Anaesthesia, 1990. 64(3): 
  p. 355-357. 
 | 
| 
 101. 
 | 
 Rackelboom, 
  T., et al., Improving continuous wound 
  infusion effectiveness for postoperative analgesia after cesarean delivery: a 
  randomized controlled trial. Obstetrics and Gynecology, 2010. 116(4): p. 893-900. 
 | 
| 
 102. 
 | 
 Ranta, 
  P.O., et al., Incisional and epidural 
  analgesia after caesarean delivery: a prospective, placebo-controlled, 
  randomised clinical study. International Journal of Obstetric Anesthesia, 
  2006. 15(3): p. 189-94. 
 | 
| 
 103. 
 | 
 Reza, 
  F.M., et al., Preemptive analgesic 
  effect of ketamine in patients undergoing elective cesarean section. 
  Clinical Journal of Pain, 2010. 26(3): 
  p. 223-226. 
 | 
| 
 104. 
 | 
 Rosaeg, 
  O.P. and M.P. Lindsay, Epidural opioid 
  analgesia after Caesarean section: A comparison of patient-controlled 
  analgesia with meperidine and single bolus injection of morphine. 
  Canadian Journal of Anaesthesia, 1994. 41(11): 
  p. 1063-1068. 
 | 
| 
 105. 
 | 
 Safavi, 
  M. and A. Honarmand, Postoperative 
  analgesia after caesarean section: Intermittent intramuscular versus 
  subcutaneous morphine boluses. Acute Pain, 2007. 9(4): p. 215-219. 
 | 
| 
 106. 
 | 
 Sakalli, 
  M., et al. The efficacy of ilioinguinal 
  and iliohypogastric nerve block for postoperative pain after Caesarean 
  section. Journal of Research in Medical Sciences, 2010. 6-13. 
 | 
| 
 107. 
 | 
 Sarvela, 
  J., et al., A double-blinded, 
  randomized comparison of intrathecal and epidural morphine for elective 
  cesarean delivery. Anesthesia and Analgesia, 2002. 95(2): p. 436-440. 
 | 
| 
 108. 
 | 
 Schewe, 
  J.C., et al., Effects of spinal 
  anaesthesia versus epidural anaesthesia for caesarean section on 
  postoperative analgesic consumption and postoperative pain. European 
  Journal of Anaesthesiology, 2009. 26(1): 
  p. 52-59. 
 | 
| 
 109. 
 | 
 Sen, S., 
  et al., The persisting analgesic effect 
  of low-dose intravenous ketamine after spinal anaesthesia for Caesarean 
  section. European Journal of Anaesthesiology, 2005. 22(7): p. 518-523. 
 | 
| 
 110. 
 | 
 Shahin, 
  A.Y. and A.M. Osman Parietal peritoneal 
  closure and persistent postcesarean pain. International Journal of Gynaecology 
  and Obstetrics, 2009. 135-9 DOI: 10.1016/j.ijgo.2008.09.012. 
 | 
| 
 111. 
 | 
 Sharar, 
  S.R., et al., A comparison of 
  postcesarean epidural morphine analgesia by single injection and by 
  continuous infusion. Regional Anesthesia, 1991. 16(4): p. 232-235. 
 | 
| 
 112. 
 | 
 Short, 
  J., et al., A single preoperative dose 
  of gabapentin does not improve postcesarean delivery pain management: a 
  randomized, double-blind, placebo-controlled dose-finding trial. Anesthesia 
  and Analgesia, 2012. 115(6): p. 
  1336-42. 
 | 
| 
 113. 
 | 
 Siddik, 
  S.M., et al., Diclofenac and/or 
  propacetamol for postoperative pain management after cesarean delivery in 
  patients receiving patient controlled analgesia morphine. Regional 
  Anesthesia and Pain Medicine, 2001. 26(4): 
  p. 310-315. 
 | 
| 
 114. 
 | 
 Singh, 
  R., D. Gupta, and A. Jain, The effect 
  of addition of intrathecal clonidine to hyperbaric bupivacaine on 
  postoperative pain after lower segment caesarean section: A randomized 
  control trial. Saudi Journal of Anaesthesia, 2013. 7(3): p. 283-290. 
 | 
| 
 115. 
 | 
 Siti 
  Salmah, G. and Y.C. Choy, Comparison of 
  morphine with fentanyl added to intrathecal 0.5% hyperbaric bupivacaine for 
  analgesia after caesarean section. Medical Journal of Malaysia, 2009. 64(1): p. 71-74. 
 | 
| 
 116. 
 | 
 Smith, 
  C.M., et al., The effects of 
  transcutaneous electrical nerve stimulation on post-cesarean pain. Pain, 
  1986. 27(2): p. 181-193. 
 | 
| 
 117. 
 | 
 Sorrori, 
  Z.Z., et al., The comparison between 
  suppository diclofenac and pethidine in post-cesarean section pain relief: A 
  randomized controlled clinical trial. Journal of Research in Medical 
  Sciences, 2006. 11(5): p. 292-296. 
 | 
| 
 118. 
 | 
 Stevens, 
  J.D., et al., Double-blind comparison 
  of epidural diamorphine and intramuscular morphine after elective Caesarean 
  section, with computerised analysis of continuous pulse oximetry. 
  Anaesthesia, 1991. 46(4): p. 
  256-259. 
 | 
| 
 119. 
 | 
 Stoddart, 
  P.A., et al. A comparison of epidural 
  diamorphine with intravenous patient-controlled analgesia using the Baxter 
  infusor following caesarean section. Anaesthesia, 1993. 1086-90. 
 | 
| 
 120. 
 | 
 Sun, 
  H.L., et al., Diclofenac sodium and low 
  dose epidural morphine for postcesarean analgesia. Ma zui xue za zhi = 
  Anaesthesiologica Sinica, 1990. 28(3): 
  p. 295-301. 
 | 
| 
 121. 
 | 
 Sun, 
  H.L., et al., Combination of low-dose 
  epidural morphine and intramuscular diclofenac sodium in postcesarean 
  analgesia. Anesthesia and Analgesia, 1992. 75(1): p. 64-68. 
 | 
| 
 122. 
 | 
 Suppa, 
  E., et al., A study of low-dose 
  S-ketamine infusion as “preventive” pain treatment for cesarean 
  section with spinal anesthesia: benefits and side effects. Minerva 
  Anestesiologica, 2012. 78(7): p. 
  774-81. 
 | 
| 
 123. 
 | 
 Surakarn, 
  J. and Y. Tannirandorn, Intramuscular 
  diclofenac for analgesia after cesarean delivery: A randomized controlled 
  trial. Journal of the Medical Association of Thailand, 2009. 92(6): p. 733-738. 
 | 
| 
 124. 
 | 
 Swart, 
  M., J. Sewell, and D. Thomas, Intrathecal 
  morphine for Caesarean section: An assessment of pain relief, satisfaction 
  and side-effects. Anaesthesia, 1997. 52(4): 
  p. 373-377. 
 | 
| 
 125. 
 | 
 Tabasi, 
  Z., M. Mahdian, and M. Abedzadeh-Kalahroudi, Closure or non-closure of peritoneum in cesarean section: outcomes of 
  short-term complications. Archives of Trauma Research, 2013. 1(4): p. 176-9. 
 | 
| 
 126. 
 | 
 Tan, 
  T.T., et al., A randomised trial of the 
  analgesic efficacy of ultrasound-guided transversus abdominis plane block 
  after caesarean delivery under general anaesthesia. European Journal of 
  Anaesthesiology, 2012. 29(2): p. 
  88-94. 
 | 
| 
 127. 
 | 
 Terajima, 
  K., et al. Efficacy of intrathecal 
  morphine for analgesia following elective cesarean section: comparison with 
  previous delivery. Journal of Nippon Medical School, 2003. 327-33. 
 | 
| 
 128. 
 | 
 Thoren, 
  T., et al., Sequential combined spinal 
  epidural block versus spinal block for cesarean section: Effects on maternal 
  hypotension and neurobehavioral function of the newborn. Anesthesia and 
  Analgesia, 1994. 78(6): p. 
  1087-1092. 
 | 
| 
 129. 
 | 
 Unlugenc, 
  H., et al., A comparative study on the 
  effects of intrathecal morphine added to levobupivacaine for spinal 
  anesthesia. Journal of Opioid Management, 2012. 8(2): p. 105-113. 
 | 
| 
 130. 
 | 
 Unlugenc, 
  H., et al., A double-blind comparison 
  of intrathecal S(+) ketamine and fentanyl combined with bupivacaine 0.5% for 
  Caesarean delivery. European Journal of Anaesthesiology, 2006. 23(12): p. 1018-1024. 
 | 
| 
 131. 
 | 
 Vallejo, 
  M.C., et al., Efficacy of the bilateral 
  ilioinguinal-iliohypogastric block with intrathecal morphine for 
  postoperative cesarean delivery analgesia. The Scientific World Journal, 
  2012. 2012. 
 | 
| 
 132. 
 | 
 van 
  Tuijl, I., et al., The effect of 
  addition of intrathecal clonidine to hyperbaric bupivacaine on postoperative 
  pain and morphine requirements after Caesarean section: a randomized 
  controlled trial. Br J Anaesth, 2006. 97(3): p. 365-70. 
 | 
| 
 133. 
 | 
 Vercauteren, 
  M.P., et al., Epidural sufentanil for 
  postoperative patient-controlled analgesia (PCA) with or without background 
  infusion: A double-blind comparison. Anesthesia and Analgesia, 1995. 80(1): p. 76-80. 
 | 
| 
 134. 
 | 
 Wolfson, 
  A., et al., Bilateral multi-injection 
  iliohypogastric-ilioinguinal nerve block in conjunction with neuraxial 
  morphine is superior to neuraxial morphine alone for postcesarean analgesia. 
  Journal of Clinical Anesthesia, 2012. 24(4): 
  p. 298-303. 
 | 
| 
 135. 
 | 
 Wu, J.I., 
  et al., Prevention of postoperative 
  nausea and vomiting after intrathecal morphine for Cesarean section: a 
  randomized comparison of dexamethasone, droperidol, and a combination. 
  International Journal of Obstetric Anesthesia, 2007. 16(2): p. 122-7. 
 | 
| 
 136. 
 | 
 Yarnell, 
  R.W., et al., Patient-controlled 
  analgesia with epidural meperidine after elective cesarean section. 
  Regional Anesthesia, 1992. 17(6): 
  p. 329-333. 
 | 
| 
 137. 
 | 
 Yu, P.Y. 
  and D.R. Gambling A comparative study 
  of patient-controlled epidural fentanyl and single dose epidural morphine for 
  post-caesarean analgesia. Canadian Journal of Anaesthesia, 1993. 416-20 
  DOI: 10.1007/BF03009509. 
 |