Gastrointest Endosc 2017 04 10;85(4):849-851. Epub 2016 May 10.
Gastroenterology and Endoscopy Unit, Pavillon L, Edouard Herriot Hospital, Lyon, France; Inserm U1032, Labtau, Lyon, France; Digestive Physiology, Pavillon L, Edouard Herriot Hospital, Lyon, France.