title: Evolution of the American hospital system: subspecialization and physician ownership.
authors.affiliation: Integris Health, 3366 Northwest Expressway, Suite 800, Oklahoma City, OK 73112, USA. Lynda.Plemons@Integris-Health.com
authors.forename: Stanley
authors.initials: S
authors.lastname: Hupfeld
mesh_terms: D004469:Economics, Hospital / Q000941:ethics; D010067:Ownership; D018584:Physician Self-Referral; D010820:Physicians; D014481:United States