1 The Dr. Henry D. Janowitz Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, New York; Department of Gastroenterology, University Hospitals of Leuven, Leuven, Belgium.
2 Department of Medicine, Perelman School of Medicine at University of Pennsylvania, Philadelphia, Pennsylvania.
3 The Dr. Henry D. Janowitz Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, New York. Electronic address: jean-frederic.colombel@mssm.edu.