[1] Univ Pittsburgh, Surg, Pittsburgh, PA 15213 USA
[2] Oregon Hlth & Sci Univ, Surg, Portland, OR USA
[3] Univ Colorado, Ernest E Moore Shock Trauma Ctr Denver Hlth, Surg, Denver, CO USA
[4] Univ Texas Hlth Sci Ctr San Antonio, Surg, San Antonio, TX USA
[5] Harris Cty Emergency Serv Dist 48, Katy, TX USA
[6] Joint Trauma Syst, Def Comm Trauma, San Antonio, TX USA
[7] San Antonio Mil Hlth Syst, Dept Surg, San Antonio, TX USA