1 Faculty of Medicine, Vilnius University, Vilnius, Lithuania.
2 Faculty of Medicine, Vilnius University, Vilnius, Lithuania; Center of Abdominal Surgery, Clinic of Gastroenterology, Nephrourology and Surgery, Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, Vilnius, Lithuania. Electronic address: tomas.poskus@santa.lt.
3 Faculty of Medicine, Vilnius University, Vilnius, Lithuania; Center of Cardiology and Angiology, Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, Vilnius, Lithuania.