title: Ambulance diversion: economic and policy considerations.
authors.forename: Robert M
authors.initials: RM
authors.lastname: Williams
mesh_terms: D000552:Ambulances / Q000191:economics* / Q000706:statistics & numerical data; D004636:Emergency Service, Hospital / Q000191:economics* / Q000706:statistics & numerical data; D006742:Hospital Bed Capacity; D006801:Humans; D007362:Intensive Care Units / Q000191:economics* / Q000706:statistics & numerical data; D009309:National Center for Health Statistics, U.S.; D011640:Public Policy; D014481:United States