1. Department of Pathology, Seoul National University Hospital and Seoul National University College of Medicine, Seoul, Korea.
2. Department of Neurosurgery, Seoul National University Hospital and Seoul National University College of Medicine, Seoul, Korea.
3. Department of Neuroradiology, Seoul National University Hospital and Seoul National University College of Medicine, Seoul, Korea.
4. Department of Industrial Engineering, Ajou University, Suwon, Korea.
5. Neuroscience Institute, Seoul National University College of Medicine, Seoul, Korea.