1 Department of Medicine, Division of Gastroenterology, McMaster University, Hamilton, Ontario, Canada.
2 Inserm U954 and Department of Hepato-Gastroenterology, Université de Lorraine, Vandœuvre-lès-Nancy, France.
3 Dr. Henry D. Janowitz Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, New York. Electronic address: [email protected].