TY - JOUR T1 - Effectiveness of a regional trauma system in reducing mortality from major trauma: before and after study. JO - BMJ PY - 1997/11/22 AU - Nicholl J AU - Turner J ED - DO - DOI: 10.1136/bmj.315.7119.1349 VL - 315 IS - 7119 SP - 1349 EP - 1354 Y2 - 2025/07/27 ER -