1. Department of Medical Imaging, University Hospital, Voutes 71110, Heraklion, Crete, Greece.
2. Anatomy Laboratory, Faculty of Medicine, University of Thessaly, Larissa, Greece.
3. Department of Radiology, 424 General Military Hospital, Thessaloniki, Greece.
4. Department of Radiology, Medical School, University of Crete, Heraklion, Crete, Greece.