[1] Univ Hosp Zurich, Gastroenterol & Hepatol, Zurich, Switzerland
[2] Univ Zurich, Zurich, Switzerland
[3] Hebrew Univ Jerusalem, Koret Sch Vet Med, Rehovot, Israel
[4] Univ Zurich, Zurich Ctr Integrat Human Physiol, Zurich, Switzerland
[5] Hadassah Univ Hosp, Obstet & Gynecol, Jerusalem, Israel