Specialists and the health care system of the 21st century.
D003363:Cost Control; D003695:Delivery of Health Care / Q000191:economics / Q000639:trends*; D005544:Forecasting; D018166:Health Care Reform; D005102:Health Expenditures / Q000639:trends; D006801:Humans; D008329:Managed Care Programs / Q000191:economics; D008389:Marketing of Health Services; D008484:Medicaid / Q000191:economics; D006278:Medicare / Q000191:economics; D008511:Medicine / Q000639:trends*; D013038:Specialization; D014481:United States