1. Department of Medicine, Division of GastroenterologyWashington University School of Medicine St. Louis Missouri
2. Department of Translational Research and New Technologies in Medicine and SurgeryUniversity of Pisa Pisa Italy
3. Department of Medicine, Division of GastroenterologyStanford University San Francisco California
4. Division of Gastroenterology, Department of Surgical, Oncological and Gastroenterological SciencesUniversity of Padua Padua Italy
5. Division of Surgery, Department of SurgeryUniversity of Campania – Luigi Vanvitelli Caserta Italy
6. Université de Lyon, Hospices Civils de LyonDigestive Physiology, Hopital E Herriot Lyon France
7. Université de LyonLyon I University, Digestive Physiology Lyon France
8. Université de Lyon Inserm U1032, LabTAU Lyon France