Cardiologists and HMOs: riding the waves of change.
D002309:Cardiology / Q000191:economics*; D003284:Contract Services / Q000458:organization & administration; D003695:Delivery of Health Care / Q000458:organization & administration*; D006279:Health Maintenance Organizations / Q000458:organization & administration*; D006761:Hospitals; D008329:Managed Care Programs / Q000458:organization & administration*; D012017:Referral and Consultation / Q000191:economics*; D012306:Risk; D014481:United States