1. University Hospital Careggi, Department of Gastroenterology, Florence, Italy
2. Department of Gastroenterology, AP-HP Hôpital Saint-Antoine, and UPMC Univ Paris 06, Paris, France
3. Pharmacology and Therapeutics, School of Medicine, National University of Ireland, Galway, Ireland
4. University Tor Vergata of Rome, GI Unit, Department of Systems Medicine, Rome, Italy
5. Agaplesion Markus Krankenhaus, Medizinische Klinik I, Frankfurt am Main, Germany
6. Department of Medicine, Hematology/Oncology, Goethe University, Frankfurt am Main, Germany
7. Department of Haematology, University Hospital Leuven, Leuven, Belgium
8. Department of Dermatology, University Zürich, Zürich, Switzerland
9. Gastroenterology Department, Humanitas Research Hospital, Rozzano, Italy
10. Service d’hépatogastroentérologie, Hopital Saint-Louis, Paris, France
11. University of Michigan, Department of Internal Medicine, Ann Arbor, USA
12. Department of Gastroenterology, Medical School, University of Ioannina, Ioannina, Greece
13. Department of Gastroenterology and Hepatology, Radboud University Medical Center, Nijmegen, The Netherlands
14. Second University of Naples, Unit of Colorectal Surgery, Department of Medical, Surgical, Neurological, Metabolic and Ageing Sciences, Naples, Italy
15. Klinik für Gastroenterologie und Hepatologie, UniversitätsSpital Zürich, Zürich, Switzerland
16. Università Cattolica del Sacro Cuore, Department of Internal Medicine, Gastroenterology Division, Roma, Italy
17. Department of Pediatrics, Nutrition and Metabolic Disorders, Children’s Memorial Health Institute, Warsaw, Poland
18. Department of Gastroenterology and Hepatology, Sheba Medical Center & Sackler School of Medicine, Israel