title: Problems, pitfalls, and opportunities in long-term randomized trials.
authors.affiliation: Department of Internal Medicine and Epidemiology, Yale University School of Medicine, New Haven, Connecticut.
authors.forename: A R
authors.initials: AR
authors.lastname: Feinstein
mesh_terms: D004358:Drug Therapy; D004992:Ethics, Medical; D006801:Humans; D011379:Prognosis; D016032:Randomized Controlled Trials as Topic; D012107:Research Design