1 Department of Digestive Diseases, Civil Hospices of Lyon, Edouard Herriot Hospital, Lyon, France; Claude Bernard Lyon 1 University, Lyon, France. Electronic address: jerome.dumortier@chu-lyon.fr.
2 Ramsay Générale de Santé, Médipôle Lyon-Villeurbanne, Villeurbanne, France.
3 Claude Bernard Lyon 1 University, Lyon, France; Department of Medical Imaging, Civil Hospices of Lyon, Edouard Herriot Hospital, Lyon, France.