1[1]Sackett DL,Rosenberg WM,Gray JA,et al.Evidence based medicine:what it is and whatit isn't[J].BMJ 1996;312∶71-2.
2[2]Sackett DL,Richardson WS,Rosenberg WM,et al.Evidence-based medicine:how to practice and teach evidence-based medicine[J].Edinburgh:Churchill & Livingstone,1997.
3[3]Sackett DL,Haynes RB,Tugwell P.Clinical epidemiology:a basic science for clinical practice[M].Boston:Little Brown & co,1985.
4[4]Woods D,Trewhellar K.Medline and Embase complement each other in literature searches[J].Bri J Med 1998;316∶1166.
5[5]Tangkanakul C,Counsell C,Warlow C.Local versus general anesthesia for carotid endarterectomy(cochrane review)[J].In:The Cochrane Library,issue 4.Oxford:Update Software,1999.
6[6]Cochrane A.Effectiveness and efficiency.Random reflections on Health Services[M].London.Nuffield Provincial Hospital Trust,1972.
7[7]Goodman NW.Anesthesia and evidence-based medicine[J].Anesthesia 1998;53∶353-68.
8[8]Horan BF.Evidence-based medicine and anesthesia:uneasy bedfellows[J]?Anesth Intebsive Care 1997;25∶679-85.
