1. From the Department of Gastroenterology and Hepatology, Amsterdam University Medical Centers, Amsterdam (G.D.); Dr. Henry D. Janowitz Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York (M.D., B.E.S.); the Center for Advanced IBD Research and Treatment, Kitasato University, Kitasato Institute Hospital, Tokyo (T.K.); Guy’s Hospital, St. Thomas’ Hospital, and the School of Immunology and Microbial Sciences, King’s College London — all in London (P.M.I.); Research Institute for...