1. Department of Surgery, Seoul National University College of Medicine, Seoul, Korea.
2. Department of Surgery, Seoul Metropolitan Government Seoul National University, Boramae Medical Center, Seoul, Korea.
3. Department of Surgery, CHA Gangnam Medical Center, CHA University School of Medicine, Seoul, Korea.
4. Department of Surgery, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Korea.
5. Department of Surgery, Hallym University Kangnam Sacred Heart Hospital, Seoul, Korea.
6. Department of Plastic and Reconstructive Surgery, Seoul National University College of Medicine, Seoul, Korea.
7. Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea.
8. Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea.