title: Need-based requirements for primary care physicians.
mesh_terms: D000208:Acute Disease; D000328:Adult; D002648:Child; D002908:Chronic Disease; D004526:Efficiency; D005194:Family Practice; D006301:Health Services Needs and Demand / Q000639:trends*; D006302:Health Services Research / Q000639:trends*; D006801:Humans; D008511:Medicine; D010548:Personal Health Services / Q000706:statistics & numerical data*; D010821:Physicians, Family / Q000600:supply & distribution*; D011320:Primary Health Care / Q000639:trends; D013038:Specialization; D014481:United States; D000078329:Workforce