Frequent emergency department use in Sweden: implications for emergency medicine in the United States.
Williams
R M
RM
D016208:Databases, Factual; D004635:Emergency Medicine / Q000458:organization & administration*; D004636:Emergency Service, Hospital / Q000706:statistics & numerical data*; D006296:Health Services / Q000706:statistics & numerical data*; D006302:Health Services Research; D006801:Humans; D009313:National Health Programs / Q000458:organization & administration; D020380:Needs Assessment / Q000458:organization & administration*; D013548:Sweden / Q000453:epidemiology; D014481:United States; D019472:Universal Health Insurance / Q000458:organization & administration