How ER revisions reduced security interventions in 'suburban' med ctr.
D004636:Emergency Service, Hospital / Q000458:organization & administration* / Q000706:statistics & numerical data; D006744:Hospital Bed Capacity, 100 to 299; D006764:Hospitals, Community / Q000458:organization & administration*; D006801:Humans; D010414:Pennsylvania; D012637:Security Measures; D013383:Suburban Population; D014743:Videotape Recording; D014754:Violence / Q000517:prevention & control*