1. Department of Neurosurgery and Interventional Neuroradiology Hiroshima City North Medical Center Asa Citizens Hospital Hiroshima Japan
2. National Center for Geriatrics and Gerontology Innovation Center for Translational Research Hiroshima Japan
3. Department of Pathology Hiroshima City North Medical Center Asa Citizens Hospital Hiroshima Japan
4. Department of Radiology Hiroshima City North Medical Center Asa Citizens Hospital Hiroshima Japan
5. Department of Neurosurgery Graduate School of Biomedical and Health Sciences Hiroshima University Hiroshima Japan