National Cerebral and Cardiovascular Centre, National Cerebral and Cardiovascular Centre, National Cerebral and Cardiovascular Centre - Department of Cardiovascular Medicine, National Hospital Organization Osaka National Hospital - Department of Stroke Neurology, Kobe City Medical Center General Hospital, University of Tsukuba - Departments of Neurosurgery, Tohoku University, Nippon Medical School, Kobe City Medical Center General Hospital, Hyogo Medical University, Hyogo Medical University, Hyogo Medical University, Hyogo Medical University and Hyogo Medical University