“…20,35,[37][38][39]42,46,47 The remaining studies were conducted in urban or mixed urban/nonurban settings. The patient populations were restricted to blunt or penetrating trauma, 19,23,25,34 orthopedic, 43 blunt pancreatic, 42 and brain and head injury, 18,21,22,27,35,44,45,51 respectively, in 14 studies. The remaining studies included a heterogeneous population of trauma patients (Table 1).…”