1. Department of Radiology, Shizuoka General Hospital
2. Department of Neurosurgery, Tokyo Medical and Dental University
3. Department of Radiology, Juntendo University
4. Department of Radiology, Nagoya University
5. Department of Radiology, Mito Medical Center
6. Department of Radiology, Kenshinkai Tokyo Medical Clinic
7. Department of Radiology, Toho University Omori Medical Center
8. Department of Neurosurgery, Juntendo University
9. Department of Neurosurgery, Nagoya University
10. Department of Neurosurgery, Juntendo Tokyo Koto Geriatric Medical Center
11. Department of Radiology, Tokyo Metropolitan Cancer Detection Center
12. Clinical Research and Trial Center, Juntendo Hospital