1. Faculty of Medicine, Vilnius University, 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. MMath, Vilnius University Hospital Santara Clinics, LT-08661 Vilnius, Lithuania
4. Center of Abdominal Surgery, Clinic of Gastroenterology, Nephrourology, and Surgery, Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, LT-08661 Vilnius, Lithuania