[1] Temple Univ, Lewis Katz Sch Med, Dept Surg, Div Trauma Surg & Surg Crit Care, 3401 N Broad St,Fourth Floor,Zone C, Philadelphia, PA 19140 USA
[2] Univ Ghana, Sch Med & Dent, Dept Surg, Accra, Ghana
[3] Univ Dev Studies, Sch Med & Hlth Sci, Dept Surg, Tamale, Ghana
[4] Univ Penn, Dept Surg, Trauma Ctr Penn, Philadelphia, PA 19104 USA
[5] Umea Univ, Dept Surg & Perioperat Sci, Umea, Sweden
[6] Linkoping Univ, Dept Clin & Expt Med, Linkoping, Sweden
[7] Univ Calif San Francisco, Dept Surg, San Francisco, CA 94143 USA
[8] Karolinska Inst, Dept Mol Med & Surg, Stockholm, Sweden