Does the primary-care gatekeeper control the costs of health care? Lessons from the SAFECO experience.
D000553:Ambulatory Care / Q000191:economics; D003363:Cost Control; D006760:Hospitalization; D007348:Insurance, Health / Q000191:economics*; D010821:Physicians, Family; D011320:Primary Health Care / Q000191:economics; D012017:Referral and Consultation; D014481:United States