1. Department of Neurosurgery, Akita University Graduate School of Medicine
2. Yokohama Tsuoka Noshinkeigeka
3. Department of Neurosurgery, Hakodate Shintoshi Hospital
4. Department of Dementia Research, Akita Prefectural Center for Rehabilitation and Psychiatric Medicine
5. Department of Radiology, Akita University Graduate School of Medicine
6. Department of Stroke Comprehensive Medical Center, Akita University Hospital