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