Principles from clinical trials relevant to clinical practice: Part I.
Califf
Robert M
RM
Duke Clinical Research Institute, Duke University Medical Center, Durham, NC 27715, USA.
DeMets
David L
DL
D002318:Cardiovascular Diseases / Q000628:therapy*; D002986:Clinical Trials as Topic; D003131:Combined Modality Therapy; D004341:Drug Evaluation; D006801:Humans; D012107:Research Design; D013997:Time Factors; D016896:Treatment Outcome