[1] Massachusetts Gen Hosp, Dept Gen Surg, Boston, MA 02114 USA
[2] Cambridge Univ Hosp NHS Fdn Trust, Dept Colorectal Surg, Cambridge, England
[3] Univ Auckland, Dept Surg, Auckland, New Zealand
[4] Univ Toronto, Mt Sinai Hosp, Dept Surg, Div Gen Surg, Toronto, ON, Canada
[5] Harvard Med Sch, Beth Israel Deaconess Hlth Med Ctr, Div Colon & Rectum Surg, Boston, MA 02115 USA
[6] Stony Brook Univ Hosp, Dept Surg, Div Colon & Rectal Surg, Stony Brook, NY USA
[7] Univ Amsterdam, Amsterdam UMC, Dept Gastroenterol & Hepatol, Meibergdreef 9, Amsterdam, Netherlands
[8] Univ Michigan, Dept Surg, Ann Arbor, MI 48109 USA
[9] Cleveland Clin, Dept Colon & Rectal Surg, Cleveland, OH 44106 USA
[10] Penn State Univ, Div Colon & Rectal Surg, Coll Med, Dept Surg, Hershey, PA USA
[11] Linkoping Univ, Cty Council Ostergotland, Dept Surg, Linkoping, Sweden
[12] Linkoping Univ, Dept Biomed & Clin Sci, Linkoping, Sweden
[13] Brigham & Womens Hosp, Crohns & Colitis Ctr, 75 Francis St, Boston, MA 02115 USA
[14] Cleveland Clin Florida, Dept Colorectal Surg, Weston, FL USA
[15] Dartmouth Hitchcock Med Ctr, Dept Surg, Lebanon, NH 03766 USA
[16] Cedars Sinai Med Ctr, Div Colorectal Surg, Los Angeles, CA 90048 USA
[17] MGH Colorectal Surg Ctr, Dept Gastrointestinal Surg & Surg Oncol, Boston, MA 02114 USA
[18] Crohns & Colitis Ctr, Dept Gastrointestinal Surg & Surg Oncol, Boston, MA 02114 USA