1. Division of Infectious Diseases, Department of Medical Subspecialties National Center for Child Health and Development Tokyo Japan
2. Center for Medical Education Kansai Medical University Osaka Japan
3. Department of Pediatrics Hamamatsu University School of Medicine Shizuoka Japan
4. Department of Pediatrics Niigata University Graduate School of Medical and Dental Sciences Niigata Japan
5. Department of Emergency and Transport Medicine National Center for Child Health and Development Tokyo Japan
6. Center for Postgraduate Education and Training National Center for Child Health and Development Tokyo Japan
7. Department of Internal Medicine University of Michigan Medical School Ann Arbor Michigan USA
8. Medicine Service, VA Ann Arbor Healthcare System Ann Arbor Michigan USA