title: Regional variation in health care: physician beliefs or patient preferences?
mesh_terms: D003710:Demography; D005102:Health Expenditures; D006801:Humans; D006278:Medicare / Q000191:economics; D018803:Models, Economic; D057240:Patient Preference; D010820:Physicians / Q000600:supply & distribution*; D010818:Practice Patterns, Physicians' / Q000191:economics*; D014481:United States