“…Eight studies were conducted in a rural setting. 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.…”