Trauma systems: Pennsylvania's progress and challenge.
D000062:Accidents, Occupational; D000063:Accidents, Traffic; D000383:Agriculture; D000552:Ambulances; D001265:Athletic Injuries / Q000453:epidemiology; D002056:Burns / Q000453:epidemiology; D004632:Emergency Medical Services; D004636:Emergency Service, Hospital; D006801:Humans; D008020:Life Support Care; D010414:Pennsylvania; D000078329:Workforce