1 Department of Gastroenterology, University Hospital of Besançon, Besançon, France; Department of Hepato-Gastroenterology, University Hospital of Nancy-Brabois, France.
2 Inserm U954 and Department of Hepato-Gastroenterology, University Hospital of Nancy-Brabois, Université Henri Poincaré, Vandoeuvre-lès-Nancy, France.