Understanding controlled trials: baseline imbalance in randomised controlled trials.
Roberts
C
C
National Primary Care Research Development Centre, University of Manchester, Manchester M13 9PL.
Torgerson
D J
DJ
D015982:Bias; D003627:Data Interpretation, Statistical; D006801:Humans; D011379:Prognosis; D016032:Randomized Controlled Trials as Topic / Q000592:standards*