1. Department of Neurosurgery, Saitama Medical University Hospital
2. Department of Neurosurgery, Teikyo University Hospital
3. Department of Neurosurgery, Fujita Banbuntane Stroke Center, Fujita Health University Banbuntane Hotokukai Hospital
4. Department of Neurosurgery, Faculty of Medicine, University of Tsukuba
5. Department of Pediatric Neurosurgery, Takatsuki General Hospital
6. Department of Neurological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
7. Department of Neurosurgery, Shinshu University School of Medicine
8. Department of Neurosurgery, Graduate School of Medicine and Pharmaceutical Science, University of Toyama
9. Department of Neurosurgery, Tokai University School of Medicine
10. Department of Neurological Surgery, Wakayama Medical University
11. Department of Neurosurgery, Yamagata University Faculty of Medicine
12. Department of Neurosurgery, Faculty of Medicine, Saga University
13. Department of Advanced Cancer Center, Yamagata University Faculty of Medicine