1. Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
2. Emergency and Critical Care Center, Kyushu University Hospital, Fukuoka, Japan
3. Stroke Center, Saga Medical Centre Koseikan, Saga, Japan
4. Department of Health Care Administration and Management, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
5. Department of Cerebrovascular Medicine, St. Mary’s Hospital, Kurume, Japan
6. Center for Cohort Studies, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan