1. Clinic of Gastroenterology, Nephrourology, and Surgery, Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, Ciurlionio Str. 21, LT-03101 Vilnius, Lithuania
2. Department of Radiology, Nuclear Medicine and Medical Physics, Institute of Biomedical Sciences, Faculty of Medicine, Vilnius University, LT-03101 Vilnius, Lithuania
3. Department of Pathology, Forensic Medicine and Pharmacology, Vilnius University, LT-03101 Vilnius, Lithuania
4. National Center of Pathology, Affiliate of Vilnius University Hospital Santaros Clinics, LT-08406 Vilnius, Lithuania