CEBM 2003
CEBM. Levels of evidence and grades of recommendation. Found at: http://www.cebm.net/levels_of_evidence.asp; website accessed Dec 2003.
CEBM 2003
CEBM. Levels of evidence and grades of recommendation. Found at: http://www.cebm.net/levels_of_evidence.asp; website accessed Dec 2003.