title: Changing guidelines for mass emergency care.
mesh_terms: D003695:Delivery of Health Care; D004219:District of Columbia; D004632:Emergency Medical Services; D004636:Emergency Service, Hospital; D005392:First Aid; D006801:Humans; D011057:Politics; D012305:Riots; D012940:Social Problems; D019966:Substance-Related Disorders; D014187:Transportation of Patients; D014754:Violence