Alternative delivery systems: the changing role of the physician.
D003363:Cost Control; D003695:Delivery of Health Care / Q000639:trends*; D004992:Ethics, Medical; D006279:Health Maintenance Organizations; D006801:Humans; D010819:Physician's Role; D010821:Physicians, Family; D012017:Referral and Consultation; D012380:Role; D014481:United States