1. From the Department of Neurology (J.T., K.M., S.O., K.T., T.S., M.S., H.M.), Osaka University Graduate School of Medicine, Japan
2. Department of Cerebrovascular Medicine, National Cerebral and Cardiovascular Center, Osaka, Japan (K.W.).
3. Department of Diagnostic and Interventional Radiology (Y.W.), Osaka University Graduate School of Medicine, Japan