title: The visualization of primary care. The White-Williams-Greenberg diagram. Introduction.
authors.affiliation: UNC-Chapel Hill School of Medicine, USA. gordon_defriese@unc.edu
authors.forename: Gordon H
authors.initials: GH
authors.lastname: DeFriese
mesh_terms: D017146:Models, Organizational; D011320:Primary Health Care / Q000458:organization & administration*