[1] Univ Copenhagen, Fac Hlth & Med Sci, Ctr Basic Metab Res, Copenhagen, Denmark
[2] Univ Hosp Hvidovre, Div Med, Gastro Unit, Hvidovre, Denmark
[3] Univ Hosp Herlev, Dept Gastroenterol, Herlev, Denmark
[4] Univ Hosp Bispebjerg, Abdominal Ctr, Kobenhavn N, Denmark
[5] Zealand Univ Hosp Koge, Dept Med, Koge, Denmark
[6] Univ Hosp Hvidovre, Dept Clin & Nucl Med, Ctr Funct & Diagnost Imaging & Res, Hvidovre, Denmark