[1] Univ Michigan Hlth Syst, Dept Surg, Ann Arbor, MI 48109 USA
[2] Univ Utah, South Jordan, UT USA
[3] Mt Sinai Med Ctr, Miami Beach, FL 33140 USA
[4] Oregon Clin, Portland, OR USA
[5] NYU, New York, NY USA
[6] Muskogee Reg Med Ctr, Muskogee, OK USA
[7] Univ S Dakota, Sanford Sch Med, Sioux Falls, SD USA
[8] Brown Univ, Sch Med, Providence, RI 02912 USA
[9] Amer Coll Surg, Chicago, IL USA