Essentials of randomized clinical trials.
Follmann
D A
DA
National Heart, Lung, and Blood Institute, Bethesda, Maryland 20892-7938, USA. follmand@nhlbi.nih.gov
Schron
E B
EB
D015982:Bias; D017326:Clinical Trials, Phase III as Topic; D004311:Double-Blind Method; D006801:Humans; D016032:Randomized Controlled Trials as Topic; D012107:Research Design; D018401:Sample Size