1. Xenotransplantation Research Center; Seoul National University College of Medicine; Seoul Korea
2. Department of Microbiology and Immunology; Seoul National University College of Medicine; Seoul Korea
3. Institute of Endemic Diseases; Seoul National University College of Medicine; Seoul Korea
4. Cancer Research Institute; Seoul National University College of Medicine; Seoul Korea
5. Department of Biomedical Sciences; Seoul National University College of Medicine; Seoul Korea
6. Department of Laboratory Medicine; Hallym University College of Medicine; Anyang Korea
7. National Medical Center; Seoul Korea
8. Department of Surgery; Seoul National University College of Medicine; Seoul Korea
9. Myong-Ji Hospital; Koyang-si Kyeonggi-do Korea
10. Department of Biomedical Sciences; Seoul National University College of Medicine; Seoul Korea. Biomedical Research Institute; Seoul National University Hospital; Seoul Korea