1. Gastroenterology Department, Colentina Clinical Hospital, Bucharest, Romania
2. Department of Internal Medicine, Carol Davila University of Medicine, Bucharest, Romania
3. Department of Gastroenterology and Hepatology, Imelda Hospital, Bonheiden, Belgium
4. Department of Gastroenterology and Hepatology, University Hospitals Leuven, Leuven, Belgium
5. Imelda GI Research Center, Bonheiden, Belgium
6. Department of Gastroenterology, University Hospital “Tsaritsa Yoanna – ISUL”, Sofia, Bulgaria
7. Department of Gastroenterology, Medical University Sofia, Sofia, Bulgaria
8. Department of Health Studies, University of Zadar, Zadar, Croatia
9. Gastroenterology Department, General Hospital Zadar, Zadar, Croatia
10. Gastroenterology Department, Cantacuzino Hospital, Bucharest, Romania
11. Internal Medicine Department, Carol Davila School of Medicine, Bucharest, Romania
12. Clinical Immunology Department, Colentina Clinical Hospital, Bucharest, Romania
13. Gastroenterology, Fondazione Policlinico Universitario Agostino Gemelli, IRCCS, Rome, Italy
14. Centre for Endoscopic Research Therapeutics and Training (CERTT), Università Cattolica del Sacro Cuore, Rome, Italy
15. University of Colorado Anschutz Medical Campus, Aurora, Colorado, United States