1. Department of Cerebrovascular Medicine; National Cerebral and Cardiovascular Center; Osaka Suita Japan
2. Division of Stroke Care Unit; National Cerebral and Cardiovascular Center; Osaka Suita Japan
3. Department of Neurology; National Cerebral and Cardiovascular Center; Osaka Suita Japan
4. Department of Cardiovascular Surgery; National Cerebral and Cardiovascular Center; Osaka Suita Japan