Data watch. Cardiologist or gatekeeper: who does it better?
D002309:Cardiology / Q000592:standards* / Q000706:statistics & numerical data; D005194:Family Practice / Q000592:standards* / Q000706:statistics & numerical data; D019538:Health Care Surveys; D006801:Humans; D007902:Length of Stay / Q000706:statistics & numerical data; D009203:Myocardial Infarction / Q000628:therapy*; D016896:Treatment Outcome; D014481:United States