1. Department of Neurosurgery, Brain Research Institute, Niigata University, Niigata
2. Laboratory of Molecular Target Therapy for Cancer, Graduate School for Medical Science, Kyoto Prefectural University of Medicine, Kyoto
3. Department of Neurosurgery, Kitanihon Neurosurgical Hospital, Gosen
4. Department of Neurosurgery, Shibata Prefectural Hospital, Shibata
5. Department of Neurosurgery, Toyama Prefectural Central Hospital, Toyama
6. Department of Neurosurgery, Uonuma-Kikan Hospital, Minamiuonuma
7. Department of Neurosurgery, Nagano Red Cross Hospital, Nagano
8. Center for Comprehensive Community Medicine, Faculty of Medicine, Saga University, Saga
9. Department of Pathology, Brain Research Institute, Niigata University, Niigata, Japan