Review Establishing the scope and methodological approach to out-of-hospital outcomes and effectiveness research.
Keim SM, Spaite DW, Maio RF, Garrison HG, Desmond JS, Gregor MA, O'malley PJ, Stiell IG, Cayten CG, Chew JL Jr, et al. Acad Emerg Med. 2004 Oct; 11(10):1067-73.