title: The costs of visits to emergency departments--revisited.
authors.forename: Robert M
authors.initials: RM
authors.lastname: Williams
mesh_terms: D003365:Costs and Cost Analysis; D004636:Emergency Service, Hospital / Q000191:economics* / Q000706:statistics & numerical data*; D017721:Hospital Costs / Q000706:statistics & numerical data*; D006801:Humans; D017059:Models, Econometric; D012044:Regression Analysis; D014481:United States