title: "Natural history" clinical trials: an enduring contribution to modern medical practice.
authors.affiliation: Merck Research Laboratories, 126 East Lincoln Avenue, PO Box 2000, Rahway, NJ 07065, USA.
authors.forename: E M
authors.initials: EM
authors.lastname: Scolnick
authors.forename: E E
authors.initials: EE
authors.lastname: Slater
authors.forename: G W
authors.initials: GW
authors.lastname: Williams
mesh_terms: D002986:Clinical Trials as Topic; D004358:Drug Therapy / Q000592:standards; D064420:Drug-Related Side Effects and Adverse Reactions; D006801:Humans