1. Division of Vascular Surgery, Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
2. Department of Surgery, Hanyang University Guri Hospital, Hanyang University College of Medicine, Guri, Korea.
3. Department of Anatomy, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
4. Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.