1. Department of Neurosurgery, Gifu University Graduate School of Medicine, Gifu, Gifu, Japan
2. Department of Neurological Surgery, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, Okayama, Okayama, Japan
3. Center for Clinical Research and Innovation, Department of Neurosurgery, Kobe City Medical Center General Hospital, Kobe, Hyogo, Japan
4. Division of Neurosurgery, Department of Brain and Neurosciences, Faculty of Medicine, Tottori University, Yonago, Tottori, Japan
5. Department of Stroke Neurology, Kohnan Hospital, Sendai, Miyagi, Japan
6. Department of Radiology, Shinbeppu Hospital, Beppu, Oita, Japan
7. Center of Endovascular Therapy, Division of Neuroendovascular Surgery, Jichi Medical University, Shimotsuke, Tochigi, Japan
8. Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York City, NY, USA
9. Stroke Prevention and Treatment, Department of Neurosurgery, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan