[1] Univ Penn, Perelman Sch Med, Div Traumatol Surg Care & Emergency Surg, Philadelphia, PA USA
[2] Univ Illinois, Carle Illinois Coll Med, 506 South Mathews Ave, Urbana, IL 61801 USA
[3] Univ Penn, Perelman Sch Med, Dept Anesthesiol & Crit Care, 3400 Spruce St, Philadelphia, PA 19104 USA
[4] Univ Penn, Perelman Sch Med, Dept Med, Div Hosp & Palliat Care Med, 3400 Spruce St, Philadelphia, PA USA
[5] Corporal Michael J Crescenz VA Med Ctr, Sect Hosp & Palliat Care Med, 3900 Woodland Ave, Philadelphia, PA 19104 USA
[6] Baylor Coll Med, Div Trauma & Acute Care Surg, One Baylor Plaza, Houston, TX 77030 USA
[7] Corporal Michael J Crescenz VA Med Ctr, Sect Surg Crit Care, 3900 Woodland Ave, Philadelphia, PA 19104 USA