[1] Univ Zurich Hosp, Dept Gastroenterol & Hepatol, Zurich, Switzerland
[2] Icahn Sch Med Mt Sinai, New York, NY USA
[3] Univ Hosp Leuven, Dept Gastroenterol & Hepatol, Leuven, Belgium
[4] Pfizer Switzerland AG, Zurich, Switzerland
[5] Pfizer Inc, New York, NY USA
[6] Hosp Clin Barcelona IDIBAPS CIBERehd, Dept Gastroenterol, Barcelona, Spain
[7] Univ Chicago, Med Inflammatory Bowel Dis Ctr, Chicago, IL USA