1. Professor Emeritus, Population Health Sciences Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK
2. Division of Gastroenterology, University of California San Diego, La Jolla, California, USA
3. 4th Local Primary Care Team, Municipality Practice and Academic Practice of Heraklion; University of Crete, Crete, Greece
4. Department of Gastroenterology, Amsterdam University Medical Centers, Amsterdam, the Netherlands
5. Department of Medicine, Baylor College of Medicine, Houston, Texas, USA
6. Department of Gastroenterology and Digestive Endoscopy, Ospedale Sandro Pertini, Local Health Agency Roma 2, Rome, Italy
7. La Mina Primary Care Academic Centre, Catalan Health Institute, University of Barcelona, Spain
8. Department of Surgery, Oncology and Gastroenterology, University of Padua, Padua, Italy
9. Wingate Institute of Neurogastroenterology, Queen Mary University of London, London, UK
10. Individual Family Practice, Bucharest, Romania
11. Division of Gastroenterology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA