1. University Department of Surgery, General and Oncologic Hospital of Kifissia ‘Agii Anargiri’, Athens, Greece
2. Department of Anatomy, Faculty of Medicine, National and Kapodistrian University of Athens, Athens, Greece
3. Department of Anatomy, School of Medicine, University of Crete, Crete, Greece
4. Department of Anatomy, Medical School, University of Thessaly, Larissa, Greece