1. Department of Neurosurgery, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi
2. Department of Neurosurgery and Radiology, Nasu Neurosurgical Center
3. Department of Neurosurgery, Kanto Neurosurgical Hospital
4. Department of Neurosurgery, Tsuru Municipal Hospital
5. Department of Neurosurgery, Kofu Johnan Hospital
6. Department of Neurosurgery, Uenohara Municipal Hospital
7. Department of Neurosurgery, Yamanashi Prefectural Central Hospital
8. Department of Neurosurgery, Kanoiwa General Hospital