Factors affecting the geographic distribution.
D003657:Decision Making; D003710:Demography; D006279:Health Maintenance Organizations; D006280:Health Workforce; D007883:Legislation, Medical; D010820:Physicians / Q000600:supply & distribution*; D010821:Physicians, Family / Q000600:supply & distribution; D011156:Population Density; D012959:Socioeconomic Factors; D013038:Specialization; D014146:Training Support; D014481:United States