title: American Pediatric Society Presidential Address 1997: the ever-whirling wheel of change.
authors.affiliation: Department of Pediatrics, Yale University School of Medicine, New Haven, Connecticut 06520, USA.
authors.forename: R B
authors.initials: RB
authors.lastname: Johnston
mesh_terms: D006666:History of Medicine; D049668:History, 15th Century; D049669:History, 16th Century; D049673:History, 20th Century; D049690:History, Ancient; D049691:History, Medieval; D010372:Pediatrics / Q000458:organization & administration* / Q000639:trends; D012955:Societies, Medical / Q000458:organization & administration* / Q000639:trends; D014481:United States