Affiliation: | Current affiliations: Department of Gastroenterology (C.J., J.B., C.M.), Department of Oncology (T.R.), Kantonsspital St. Gallen, St. Gallen; Statistics Unit (J.S.), Coordinating Center (P.B.), Swiss Group for Clinical Cancer Research (SAKK), Berne; Department of Gastroenterology, University Hospital Zurich, Zürich (P.B.); Department of Visceral Surgery, Stadtspital Triemli, Zürich (U.M.); Department of Gastroenterology, Kantonsspital Chur, Chur (B.W.); Department of Gastroenterology, Kantonsspital Aarau, Aarau (J.K.); Department of Gastroenterology, University Hospital Geneva, Geneva (J.-L.F.); Department of Gastroenterology, Stadtspital Waid, Zürich (P.B.), Switzerland |