Recognising the limits of randomized clinical trials.
Brown
N
N
Gray
D
D
Hampton
J R
JR
D006801:Humans; D009203:Myocardial Infarction / Q000628:therapy; D018579:Patient Selection; D011785:Quality Assurance, Health Care / Q000706:statistics & numerical data; D016032:Randomized Controlled Trials as Topic / Q000706:statistics & numerical data*; D015983:Selection Bias