The 15 most significant influences in EMS in the past 15 years.
D016223:Advance Directives; D002055:Burnout, Professional; D002648:Child; D002662:Child Health Services; D004631:Emergency Medical Service Communication Systems; D004632:Emergency Medical Services / Q000458:organization & administration / Q000639:trends*; D018166:Health Care Reform; D006292:Health Priorities; D006801:Humans; D009936:Organizational Innovation; D017749:Total Quality Management; D014481:United States; D014754:Violence; D014838:Volunteers