title: Evolution of the controlled clinical trial.
authors.forename: J E
authors.initials: JE
authors.lastname: Lennard-Jones
mesh_terms: D002986:Clinical Trials as Topic / Q000266:history*; D004992:Ethics, Medical; D049671:History, 18th Century; D049673:History, 20th Century; D006801:Humans; D012107:Research Design