Effectiveness of patient care in an emergency room.
D001660:Biliary Tract Diseases / Q000000981:diagnostic imaging / Q000628:therapy; D002765:Cholecystography; D002908:Chronic Disease; D004636:Emergency Service, Hospital / Q000706:statistics & numerical data*; D005767:Gastrointestinal Diseases / Q000000981:diagnostic imaging / Q000628:therapy; D006801:Humans; D008396:Maryland; D011787:Quality of Health Care