Janak JC, Sosnov JA, Bares JM, Stockinger ZT, Montgomery HR, Kotwal RS, Butler FK, Shackelford SA, Gurney JM, Spott MA, Finelli LN, Mazuchowski EL, Smith DJ. Comparison of Military and Civilian Methods for Determining Potentially Preventable Deaths: A Systematic Review. JAMA Surg. 2018 04 01; 153(4):367-375.