1. Department of Neurosurgery, Seoul National University Hospital, Seoul, Korea.
2. Department of Neurosurgery, Physiology, and Biomedical Engineering, Mayo Clinic, Mineapolis, MN, USA.
3. Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea.
4. Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul, Korea.
5. Department of Radiology, Seoul National University Hospital, Seoul, Korea.
6. Neuroscience Research Institute, Gachon University of Medicine and Science, Incheon, Korea.