title: Designation of physician shortage areas: the problem of specialty mix variations.
mesh_terms: D000574:American Medical Association; D003710:Demography; D004526:Efficiency; D006280:Health Workforce; D006801:Humans; D008507:Medically Underserved Area; D008962:Models, Theoretical; D010820:Physicians / Q000600:supply & distribution; D010821:Physicians, Family / Q000600:supply & distribution*; D011320:Primary Health Care / Q000706:statistics & numerical data; D013038:Specialization; D014481:United States