1. Department of Emergency and Disaster Medicine Juntendo University Graduate School of Medicine Tokyo Japan
2. Department of Traumatology and Acute Critical Medicine Osaka University Graduate School of Medicine Osaka Japan
3. Department of General Medical Science Graduate School of Medicine Chiba University Chiba City Japan
4. Department of Emergency and Critical Care Medicine Eastern Chiba Medical Center Chiba Japan
5. Department of Anesthesiology and Critical Care Medicine Division of Acute and Critical Care Medicine Hokkaido University Graduate School of Medicine Sapporo Japan
6. Department of Emergency and Critical Care Medicine School of Medicine Keio University Tokyo Japan
7. Division of Emergency and Critical Care Medicine Tohoku University Graduate School of Medicine Sendai Japan