1. Department of Surgery, Kyungpook National University School of Medicine, Daegu, Korea
2. Department of Orthopedic Surgery, Kyungpook National University School of Medicine, Daegu, Korea
3. Department of Plastic Surgery, Kyungpook National University School of Medicine, Daegu, Korea
4. Division of Vascular Surgery,Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea