1. Department of Pediatrics, Seoul National University Children's Hospital, Seoul National University College of Medicine, Seoul, Korea.
2. Division of Pediatric Neurosurgery, Seoul National University Children's Hospital, Seoul National University College of Medicine, Seoul, Korea.
3. Department of Anatomy, Seoul National University Children's Hospital, Seoul National University College of Medicine, Seoul, Korea.
4. Division of Pediatric Neurology, Seoul National University Children's Hospital, Seoul National University College of Medicine, Seoul, Korea.
5. Department of Pathology, Seoul National University Children's Hospital, Seoul National University College of Medicine, Seoul, Korea.
6. Division of Pediatric Radiology, Seoul National University Children's Hospital, Seoul National University College of Medicine, Seoul, Korea.