[1] Mayo Clin, Dept Surg, Rochester, MN 55905 USA
[2] Cedars Sinai Med Ctr, Karsh Div Gastroenterol & Hepatol, Los Angeles, CA 90048 USA
[3] Kansas City Univ, Coll Med, Kansas City, MO USA
[4] Univ Calif Los Angeles, David Geffen Sch Med, Dept Surg, Los Angeles, CA 90095 USA
[5] Houston Methodist Hosp, Dept Surg, Houston, TX 77030 USA
[6] Carle Fdn Hosp Gen Surg Residency, Champaign, IL 61801 USA