1. First Department of Medicine, University of Szeged, Szeged, Hungary
2. First Department of Internal Medicine, Semmelweis University, Budapest, Hungary
3. Military Hospital – State Health Centre, Budapest, Hungary
4. 1st Department of Medicine, Peterfy Hospital, Budapest, Hungary
5. 2nd Department of Medicine, Zala County Hospital, Zalaegerszeg, Hungary
6. 2nd Department of Medicine, B-A-Z County and University Teaching Hospital, Miskolc, Hungary
7. Department of Internal Medicine, Csolnoky Ferenc Regional Hospital, Veszprém, Hungary
8. Second Department of Internal Medicine, Semmelweis University, Budapest, Hungary
9. Institute of Medicine, Department of Gastroenterology, University of Debrecen, Clinical Center, Debrecen, Hungary
10. Department of Medicine and Gastroenterology, Markusovszky Hospital, Szombathely, Hungary
11. Department of Gastroenterology, Tolna County Teaching Hospital, Szekszárd, Hungary
12. Department of Gastroenterology, Janos Hospital, Budapest, Hungary
13. 1st Department of Medicine, University of Pécs, Pécs, Hungary
14. IBD Clinical and Research Centre, Iscarea.s., Prague, Czech Republic
15. 1st Medical Faculty, Charles University, Prague, Czech Republic
16. Department of Internal Medicine, Military Hospital, Charles University, Prague, Czech Republic
17. Institute of Pharmacology, 1st Medical Faculty, Charles University, Prague, Czech Republic
18. Department of Paediatrics, Faculty Hospital Motol, 2nd Medical Faculty, Charles University, Prague, Czech Republic
19. Institute of Medical Biochemistry and Laboratory Diagnostics, 1st Medical Faculty and General Teaching Hospital, Charles University, Prague, Czech Republic