1. Department of Neurosurgery, Kyoto University, Kyoto, Japan
2. Department of Neurovascular Research, Kobe City Medical Center General Hospital, Kobe, Japan
3. Department of Neurosurgery, Seijinkai Shimizu Hospital, Kyoto, Japan
4. Division of Interventional Neuroradiology, Ronald Reagan UCLA Medical Center, Los Angeles, CA, USA
5. Department of Neurosurgery, Kobe City Medical Center General Hospital, Kobe, Japan
6. Department of Neurosurgery, Juntendo University, Tokyo, Japan
7. Department of Neurosurgery, National Osaka Hospital, Osaka, Japan
8. Department of Neurosurgery, Tsukuba University, Tsukuba, Japan
9. Department of Neurosurgery, National Cerebral and Cardiovascular Center, Suita, Japan
10. Department of Neurosurgery, Hyogo Medical University, Nishinomiya, Japan
11. Department of Neurosurgery, Nagoya University, Nagoya, Japan
12. Department of Neurosurgery, Kindai University, Sayama, Japan
13. Department of Neurosurgery, Shinrakuen Hospital, Niigata, Japan
14. Department of Neurosurgery, Okayama University, Okayama, Japan
15. Department of Neurosurgery, Aichi Medical University, Nagoya, Japan
16. Department of Stroke Neurology, Kyorin Medical University, Tokyo, Japan
17. Division of Medical Statistics and Data Science, Foundation for Biomedical Research and Innovation, Kobe, Japan