[1] Univ So Calif, Div Gastrointestinal & Liver Dis, Keck Sch Med, Los Angeles, CA 90033 USA
[2] Univ Calif Los Angeles, David Geffen Sch Med, Los Angeles, CA 90095 USA
[3] VA Greater Los Angeles Healthcare Syst, Div Digest Dis, Los Angeles, CA USA
[4] Univ Calgary, Div Gastroenterol, Calgary, AB, Canada
[5] McMaster Univ, Med Ctr, Div Gastroenterol, Hamilton, ON, Canada
[6] Erasmus MC Univ Med Ctr, Dept Gastroenterol & Hepatol, Rotterdam, Netherlands
[7] Erasmus MC Univ Med Ctr, Dept Internal Med, Rotterdam, Netherlands
[8] CHU Dijon, Ctr Invest Clin, Dijon, France
[9] Chinese Univ Hong Kong, Inst Digest Dis, Shatin, Hong Kong, Peoples R China
[10] McGill Univ, Div Gastroenterol, Montreal, PQ, Canada