1. Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea.
2. Cancer Research Institute, Seoul National University, Seoul, Republic of Korea.
3. Interdisciplinary Program in Cancer Biology Major, Seoul National University College of Medicine, Seoul, Republic of Korea.
4. Department of Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea.
5. Department of Neurosurgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea.