Mee Kum Kim1,2,3, Chung-Gyu Park3,4,5,6,7. 1. Department of Ophthalmology, Seoul National University College of Medicine, Seoul, Korea. 2. Laboratory of Ocular Regenerative Medicine and Immunology, Seoul Artificial Eye Center, Seoul National University Hospital Biomedical Research Institute, Seoul, Korea. 3. Xenotransplantation Research Center, Seoul National University College of Medicine, Seoul, Korea. 4. Department of Microbiology and Immunology, Seoul National University College of Medicine, Seoul, Korea. 5. Department of Biomedical Science, Seoul National University Graduate School, Seoul, Korea. 6. Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea. 7. Institute of Endemic Diseases, Seoul National University College of Medicine, Seoul, Korea.