[1] North Zealand Univ Hosp, Dept Gastroenterol, Frederikssund, Denmark
[2] Hvidvore Univ Hosp, Gastrounit, Med Sect, Hvidovre, Denmark
[3] Icahn Sch Med Mt Sinai, Susan & Leonard Feinstein IBD Clin Ctr, Dept Med, New York, NY 10029 USA
[4] Icahn Sch Med Mt Sinai, Susan & Leonard Feinstein IBD Clin Ctr, Dept Pediat, New York, NY 10029 USA
[5] Dartmouth Hitchcock Med Ctr, Sect Gastroenterol & Hepatol, Lebanon, NH USA
[6] Zealand Univ Hosp, Dept Med Gastroenterol, Koge, Denmark