1. Department of Radiology, Faculty of Medicine; University of Warmia and Mazury in Olsztyn; Poland
2. Department of Radiology; Medical University of Bialystok; Poland
3. Department of Anatomical Sciences; St. George's University, School of Medicine; Grenada, West Indies
4. Department of Anatomy, Faculty of Medicine; University of Warmia and Mazury in Olsztyn; Poland
5. Department of Diagnostic Imaging; Independent Public Provincial Hospital of J. Sniadecki in Bialystok; Poland