1. Disease Control and Prevention Center National Center for Global Health and Medicine Tokyo Japan
2. Department of Emerging and Reemerging Infectious Diseases Tohoku University School of Medicine Miyagi Japan
3. Division of Infectious Diseases Department of Medical Subspecialties National Center for Child Health and Development Tokyo Japan
4. Department of Social Medicine Research Institute National Center for Child Health and Development Tokyo Japan
5. Department of Pediatrics Okayama University Hospital Okayama City Okayama Japan
6. Division of Infectious Diseases Department of Pediatrics Hyogo Prefectural Kobe Children Hospital Kobe City Hyogo Japan
7. Division of Infectious Diseases School of Medicine International Research Institute of Disaster Science, and Tohoku Medical Megabank Organization Tohoku University Sendai Miyagi Japan
8. Department of Microbiology, Immunology, and Biochemistry University of Tennessee Health Science Center Memphis TN USA
9. Department of Pediatrics Hamamatsu University School of Medicine Hamamatsu Shizuoka Japan