[1] Karolinska Inst, Dept Clin Sci Intervent & Technol CLINTEC, Div Surg, Stockholm, Sweden
[2] Amsterdam Univ Med Ctr, Dept Gastroenterol & Hepatol, De Boelelaan 1118, Amsterdam, Netherlands
[3] Amsterdam Univ Med Ctr, Dept Surg, Amsterdam, Netherlands
[4] Amsterdam Gastroenterol Endocrinol Metab, Amsterdam, Netherlands
[5] Klin Hirslanden, Ctr Gastroenterol, Zurich, Switzerland
[6] Univ Spital, Dept Gastroenterol & Hepatol, Zurich, Switzerland
[7] Stadtspital Zurich, Dept Gastroenterol & Hepatol, Zurich, Switzerland
[8] Univ Hosp Zurich, Dept Visceral & Transplant Surg, Zurich, Switzerland