1. Faculty of Medicine , University of Latvia , 6 Linezera Str., LV1006 , Rīga , Latvia
2. Scientific Laboratory of Molecular Genetics , Rīga Stradiņš University , Rīga , Latvia
3. Department of Nephrology and Renal Replacement Therapies , Rīga East University Hospital , Rīga , Latvia
4. Department of Pathology , Rīga East University Hospital , Rīga , Latvia ;
5. Laboratory of Microbiology , Rīga East University Hospital , Rīga , Latvia ;
6. Faculty of Medicine , Lithuanian University of Health Sciences , Kaunas , Lithuania ;
7. Centre of Digestive Diseases “GASTRO” , Rīga , Latvia ;
8. Department of Internal Medicine , Rīga Stradiņš University , Rīga , Latvia
9. Department of Science , Rīga East University Hospital , Rīga , Latvia