1. Department of Anatomy and Cell Biology, Seoul National University College of Medicine, Seoul 03080, Korea.
2. Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul 03080, Korea.
3. Department of Surgery, Seoul National University Hospital, Seoul 03080, Korea.
4. Department of Surgery, Seoul National University College of Medicine, Seoul 03080, Korea.
5. Cancer Research Institute, Seoul National University, Seoul 03080, Korea.
6. Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul 03080, Korea.