Evaluating the evidence: is there a rigid hierarchy?
Denver Veterans Affairs Medical Center, University of Colorado Denver, Denver, CO 80204, USA.
P Michael
PM
Ho
Pamela N
PN
Peterson
Frederick A
FA
Masoudi
D035843:Biomedical Research / Q000592:standards*; D002309:Cardiology / Q000592:standards*; D002318:Cardiovascular Diseases / Q000628:therapy*; D002986:Clinical Trials as Topic / Q000592:standards*; D019317:Evidence-Based Medicine / Q000592:standards*; D006801:Humans