1. Department of Emergency and Critial Care Medicine Keio University School of Medicine Tokyo Japan
2. Department of Acute Medicine Kawasaki Medical School Kurashiki Japan
3. Department of Infectious Diseases International University of Health and Welfare School of Medicine Narita Japan
4. Division of Emergency and Critical Care Medicine Tohoku University Graduate School of Medicine Sendai Japan
5. Infection Control Team Nippon Medical School Hospital Tokyo Japan
6. Division of Infectious Diseases National Center for Child Health and Development Tokyo Japan
7. Infection Control Team Nippon Medical School Musashikosugi Hospital Kawasaki Japan
8. Division of Comprehensive Medicine Tohoku University Graduate School of Medicine Sendai Japan
9. Department of Internal Medicine Chugoku Central Hospital Fukuyama Japan
10. Division of Nursing Osaka University Hospital Osaka Japan
11. National Hospital Organization Kumamoto Medical Center Kumamoto Japan