title: The societal perspective: monocular or bifocal? Presidential address.
authors.forename: J T
authors.initials: JT
authors.lastname: Frakes
mesh_terms: D016099:Endoscopy, Gastrointestinal / Q000266:history*; D005767:Gastrointestinal Diseases / Q000175:diagnosis / Q000266:history / Q000628:therapy; D049673:History, 20th Century; D006801:Humans; D012955:Societies, Medical / Q000266:history*; D014481:United States