1. Advanced Medical Emergency and Critical Care Center, Yamaguchi University Hospital, Yamaguchi, Japan.
2. Department of Emergency Medicine, Tokuyama Central Hospital, Yamaguchi, Japan.
3. Emergency and General Medicine, Kumamoto University Hospital, Kumamoto, Japan.
4. Department of Neurosurgery, Yamaguchi University School of Medicine, Yamaguchi, Japan.
5. Department of Emergency and Critical Care Medicine, Showa University Hospital, Tokyo, Japan.
6. Department of Emergency, Disaster, and Critical Care Medicine, Faculty of Medicine, Kagawa University, Kagawa, Japan.
7. Osaka Mishima Emergency Critical Care Center, Osaka, Japan.
8. Yamaguchi Prefectural Grand Medical Center, Yamaguchi, Japan.