1. Center of Gastroenterology, Hepatology and Nutrition, Pauls Stradiņš Clinical University Hospital, Riga, Latvia
2. Department of Surgery, Pauls Stradiņš Clinical University Hospital, Riga, Latvia
3. Department of Internal Medicine, Pauls Stradiņš Clinical University Hospital, Riga, Latvia
4. Department of Oncology, Pauls Stradiņš Clinical University Hospital, Riga, Latvia
5. Department of Radiology, Pauls Stradiņš Clinical University Hospital, Riga, Latvia
6. Department of Pathology, Pauls Stradiņš Clinical University Hospital, Riga, Latvia