1. Department of Vascular Surgery, Sina Hospital, Tehran University of Medical Science, Tehran, Iran;
2. School of Medicine, Tehran University of Medical Sciences, Tehran, Iran;
3. Department of General and Vascular Surgery, Shahid Beheshti Hospital of Yasuj University of Medical Sciences, Yasuj, Iran;
4. Department of Vascular Surgery, Emam Khomeini Hospital, Tehran University of Medical Science, Tehran, Iran