1. Stroke Center; Osaka University Graduate School of Medicine; Suita Osaka Japan
2. Department of Neurology; Osaka University Graduate School of Medicine; Suita Osaka Japan
3. Department of Neurology; Tokyo Women's Medical University; Tokyo Japan
4. Department of Cardiovascular Surgery; Osaka University Graduate School of Medicine; Suita Osaka Japan
5. Department of Cardiovascular Medicine; Osaka University Graduate School of Medicine; Suita Osaka Japan
6. Department of Neurosurgery; Osaka University Graduate School of Medicine; Suita Osaka Japan