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