1. Department of Neurosurgery, Saitama Medical Center, Saitama Medical University, Saitama, Japan
2. Department of Neuro-Oncology/Neurosurgery, Saitama Medical University International Medical Center, Saitama, Japan
3. Department of Pathology, Saitama Medical Center, Saitama Medical University, Saitama, Japan
4. Department of Pathology, Tokai University Oiso Hospital, Kanagawa, Japan
5. Department of Forensic Medicine, Tokyo Medical and Dental University, Tokyo, Japan
6. Department of Neurosurgery, International University of Health and Welfare Mita Hospital, Minata-ku, Japan
7. Department of Neurosurgery, International University of Health and Welfare Narita Hospital, Narita, Japan