1. Department of Internal Diseases, Rīga Stradiņš University , Riga , Latvia
2. Centre of Gastroenterology, Hepatology and Nutrition, Pauls Stradiņš Clinical University Hospital , Riga , Latvia
3. Department of Internal Diseases, Gastroenterology and Dietetics, North-Western State Medical University named after I.I. Mechnikov , St. Petersburg , Russia
4. Institute of Perinatology and Pediatrics, Almazov National Medical Research Centre , Saint Petersburg , Russia
5. R&D Department, Elpis Ltd , Riga , Latvia