How do we know what we know? The randomized controlled trial revisited.
Heaney
R P
RP
D015982:Bias; D015331:Cohort Studies; D003627:Data Interpretation, Statistical; D004311:Double-Blind Method; D005500:Follow-Up Studies; D006801:Humans; D016032:Randomized Controlled Trials as Topic / Q000379:methods*; D012107:Research Design