1. Department of Surgery, Jeonbuk National University Hospital, Jeonju, Korea.
2. Division of Vascular Surgery, Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
3. Cardiac and Vascular Center, Samsung Medical Center, Seoul, Korea.
4. Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
5. Division of Vascular Surgery, Department of Surgery, Kangbuk Samsung Hospital, Seoul, Korea.