1. Division of Vascular Surgery, Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
2. Division of Vascular Surgery, Department of Surgery, Inha University Hospital, Inha University School of Medicine, Incheon, Korea.
3. Division of Vascular Surgery, Department of Surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.
4. Department of Surgery, Yonsei University School of Medicine, Seoul, Korea.
5. Department of Critical Care Medicine and Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.