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

Hitachi General Hospital - Department of Emergency and Critical Care Medicine, University of Tsukuba - Department of Emergency and Critical Care Medicine, Hitachi General Hospital - Department of Emergency and Critical Care Medicine, Hitachi General Hospital - Department of Emergency and Critical Care Medicine, National Center for Global Health and Medicine - Department of Emergency Medicine and Critical Care, National Center for Global Health and Medicine - Department of Emergency Medicine and Critical Care, Teikyo University - Department of Emergency Medicine, TMG Asaka Medical Center - Neurointensive Care Unit, Neurosurgery, Stroke and Epilepsy Center, TMG Asaka Medical Center - Neurointensive Care Unit, Neurosurgery, Stroke and Epilepsy Center, Nippon Medical School Tama Nagayama Hospital - Department of Emergency and Critical Care Medicine, Nippon Medical School Tama Nagayama Hospital - Department of Emergency and Critical Care Medicine, Juntendo University - Department of Emergency and Critical Care Medicine, Jichi Medical University - Department of Emergency and Critical Care Medicine, Dokkyo Medical University - Emergency and Critical Care Medical Center, Dokkyo Medical University - Emergency and Critical Care Medical Center, University of Tsukuba - Department of Biostatistics, University of Tsukuba - Department of Biostatistics, University of Tsukuba Hospital/Ibaraki Prefectural Central Hospital - Epilepsy Center, University of Tsukuba - Departments of Neurosurgery, University of Tsukuba - Department of Emergency and Critical Care Medicine and Independent