Pre-hospital emergency care.
D000552:Ambulances; D004632:Emergency Medical Services / Q000458:organization & administration*; D004634:Emergency Medical Technicians; D004636:Emergency Service, Hospital / Q000458:organization & administration; D006745:Hospital Bed Capacity, 300 to 499; D008824:Michigan; D012041:Regional Medical Programs / Q000458:organization & administration; D014187:Transportation of Patients