Competitive forces in the market for physicians' services: a survey of current research.
D004465:Economic Competition / Q000639:trends*; D004467:Economics / Q000639:trends*; D006279:Health Maintenance Organizations / Q000191:economics; D006301:Health Services Needs and Demand; D006302:Health Services Research; D007357:Insurance, Physician Services / Q000191:economics*; D014481:United States