1. Department of Internal Medicine, 2nd Faculty of Medicine, Charles University in Prague and Motol University Hospital, Prague, Czech Republic;
2. 2nd Department of Internal Medicine, 3rd Faculty of Medicine, Charles University in Prague, FNKV, Prague, Czech Republic;
3. Department of Hepatogastroenterology, Institute for Clinical and Experimental Medicine, Prague, Czech Republic;
4. Clinic of Internal Medicine, University Hospital Ostrava, Ostrava, Czech Republic;
5. 2nd Department of Internal Medicine, University Hospital Olomouc, Olomouc, Czech Republic;
6. Digestive Diseases Center, Vítkovice Hospital, Ostrava, Czech Republic;
7. 2nd Department of Internal Medicine-Gastroenterology, University Hospital Hradec Králové, Hradec Králové, Czech Republic;
8. Department of Internal Medicine, Hospital Na Bulovce, Prague, Czech Republic;
9. 2nd Department of Internal Medicine, University Hospital Plzeň-Bory, Plzeň, Czech Republic;
10. 4th Department of Internal Medicine – Clinic of Gastroenterology and Hepatology, The General University Hospital in Prague, 1st Medical Faculty, Charles University in Prague, Prague, Czech Republic;
11. Department of Economic and Social Policy, University of Economics, Prague, Czech Republic