1. Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
2. Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University
3. Department of Radiology, National Cerebral and Cardiovascular Center
4. Department of Radiology, Tohoku University Hospital
5. Department of Statistics and Data Analysis, National Cerebral and Cardiovascular Center
6. Department of Pathology, National Cerebral and Cardiovascular Center
7. Department of Radiology, Osaka Neurological Institute