1. Emergency Telephone Consultation Centre, Tokyo Medical Association, Japan
2. Division of Emergency and Critical Care Medicine, Department of Acute Medicine, Nihon University School of Medicine, Tokyo, Japan
3. Department of Emergency Medicine, Yokohama City University School of Medicine, Japan
4. Department of Critical Care and Emergency Medicine, Tokyo Women’s Medical University School of Medicine, Japan
5. Department of Anesthesiology, Koto Hospital, Tokyo, Japan
6. EMS Service Section Consultation Branch, EMS Division, Tokyo Fire Department, Japan
7. Shirahigebashi Hospital, Tokyo, Japan
8. Department of Critical and Emergency Medicine, Showa University Hospital, Tokyo, Japan