ERs adapt to era of HMOs.
Greene
J
J
D002985:Clinical Protocols; D004636:Emergency Service, Hospital / Q000592:standards / Q000706:statistics & numerical data*; D006279:Health Maintenance Organizations / Q000191:economics*; D006300:Health Services Misuse / Q000191:economics; D007345:Insurance Claim Review; D014218:Triage; D014481:United States