1. Department of Emergency and Critical Care Medicine Tohoku University Hospital Sendai Japan
2. Division of Emergency and Critical Care Medicine Tohoku University Graduate School of Medicine Sendai Japan
3. Emergency and Critical Care Department Sendai City Hospital Sendai Japan
4. Department of Emergency and Critical Care Medicine Wakayama Medical University Wakayama Japan
5. Education and Training Center for Students and Professionals in Healthcare Hyogo College of Medicine Nishinomiya Japan
6. Department of Clinical Epidemiology Hyogo College of Medicine Nishinomiya Japan
7. Osaka Prefectural Nakakawachi Emergency and Critical Care Center Higashiosaka Japan