TY - JOUR T1 - The 4-Hour Rule: Preventing Crowding in the Emergency Department Reply JO - ANNALS OF EMERGENCY MEDICINE PY - 2012/07/01 AU - Mason S AU - Coster J AU - Freeman J AU - Weber EJ AU - Locker T ED - DO - DOI: 10.1016/j.annemergmed.2012.01.011 VL - 60 IS - 1 SP - 133 EP - 134 Y2 - 2025/07/30 ER -