| Affiliation: | 1. Department of Gastroenterology and Endoscopy, Rene Descartes University, , France;2. Unit of Epidemiology and Clinical Research INSERM, Centre d'Investigation épidémiologique 4, F, Georges Pompidou European Hospital, Rene Descartes University, , France;3. Department of Gastroenterology and Endoscopy, Edouard Herriot Hospital, , Lyon, France;4. Department of Gastroenterology and Endoscopy, Saint Phillibert Hospital, , Lille, France;5. Department of Gastroenterology and Endoscopy, Nouvel H?pital Civil, , Strasbourg, France;6. Department of Gastroenterology and Endoscopy, Lariboisière Hospital, Assistance Publique—H?pitaux de Paris, , Paris, France |
