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