1. Department of Neurosurgery, Takayama Red Cross Hospital
2. Department of Health and Environmental Sciences, Kyoto University Graduate School of Medicine
3. Department of Health and Environmental Sciences, Kyoto University Graduate School of Medicine:Department of Neurosurgery, Kyoto University Graduate School of Medicine
4. Department of Neurosurgery, Gifu Prefectural Gero Hot Springs Hospital
5. Department of Neurosurgery, Faculty of Medicine, Saga University