1. Department of Pathology; Gangnam Severance Hospital, Yonsei University College of Medicine; Seoul South Korea
2. Department of Neurosurgery; Gangnam Severance Hospital, Yonsei University College of Medicine; Seoul South Korea
3. Department of Pediatric Neurosurgery; Severance Children's Hospital, Yonsei University College of Medicine; Seoul South Korea
4. Department of Radiology; Severance Hospital, Yonsei University College of Medicine; Seoul South Korea
5. Center for Pediatric Cancer; National Cancer Center; Goyang South Korea
6. Department of Pathology; Severance Hospital, Yonsei University College of Medicine; Seoul South Korea