Constance Geffrier1, Elia Samaha1, Henri Duboc2. 1. Department of Gastroenterology, APHP, Georges Pompidou European Hospital, Paris, France. 2. Emergency Endoscopy Ward, Department of Digestive Diseases, APHP, Lariboisiere Hospital, and DHU UNITY, Inserm UMR 1149, Paris, France.