1. Department of Surgery, University Hospital Kralovske Vinohrady, Prague, Czech Republic
2. Department of Anatomy, Second Faculty of Medicine, Charles University, Prague Czech Republic
3. Division of Vascular Surgery, University Hospital Kralovske Vinohrady and Third Faculty of Medicine, Charles University, Prague, Czech Republic
4. Department of Vascular Surgery, National Institute for Cardiovascular Disease, Bratislava, Slovak Republic