1. Department of Nutrition, Women’s College for Nutrition, Japan
2. Department of Laboratory Medicine, Saitama Medical School, Japan
3. Department of Pediatrics, Saitama Medical School, Japan
4. Department of Virology I, National Institute of Infectious Diseases, Japan
5. Department of Obstetrics and Gynecology, Saitama Medical School, Japan
6. Department of Infectious Diseases and Infection Control, Saitama Medical School, Japan
7. Department of Bacteriology II, National Institute of Infectious Diseases, Japan