Patients as their own controls in studies of therapeutic efficacy: can we trust the results of non-randomized trials?
Weiss
N S
NS
Department of Epidemiology, School of Public Health and Community Medicine, University of Washington, Seattle 98195.
Heckbert
S R
SR
D002986:Clinical Trials as Topic / Q000592:standards*; D006801:Humans; D011897:Random Allocation; D012107:Research Design / Q000592:standards*; D013223:Statistics as Topic