1. Department of Neurology Osaka University Graduate School of Medicine OsakaJapan
2. Department of Neurology Kobe City Medical Center General Hospital HyogoJapan
3. Division of Stroke Neurology National Hospital Organization Osaka National Hospital OsakaJapan
4. Department of Neurology National Cerebral and Cardiovascular Center OsakaJapan
5. Department of Cerebrovascular Medicine National Cerebral and Cardiovascular Center Osaka Japan
6. Department of Neurology Medical Faculty Mannheim University of Heidelberg Mannheim Germany