title: Medical history and the cardiologist.
authors.affiliation: Mayo Clinic, Rochester, MN 55905.
authors.forename: J A
authors.initials: JA
authors.lastname: Callahan
mesh_terms: D002309:Cardiology / Q000266:history; D006666:History of Medicine; D049669:History, 16th Century; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century