Affiliation: | 1. Department of Neurosurgery, Ohnishi Neurological Center, Akashi, Hyogo, Japan;2. Department of Neurosurgery, Nara Medical University, Kashihara, Nara, Japan;1. Department of Neurosurgery, Ise Red Cross Hospital, Ise, Mie, Japan;2. Department of Neurosurgery, Mie University Hospital, Tsu, Mie, Japan;1. Department of Neurosurgery, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan;2. Department of Neurosurgery, Geriatrics Research Institute and Hospital, Maebashi, Gunma, Japan;3. Department of Neurosurgery, National Hospital Organization Takasaki General Medical Center, Takasaki, Gunma, Japan;4. Department of Neurosurgery, Fukaya Red Cross Hospital, Fukaya, Saitama, Japan;5. Department of Neurosurgery, Hokushin General Hospital Nagano Prefectural Federation of Agricultural Cooperatives for Health and Welfare, Nakano, Nagano, Japan |