affiliation not provided to SSRN, National Institute of Infectious Diseases, affiliation not provided to SSRN, Okinawa Prefectural Nanbu Medical enter & Children’s Medical Center - Department of Pediatric Infectious Diseases, Toyama Institute of Health - Department of Research Planning, affiliation not provided to SSRN, Kochi University, Okayama University, Niigata University, Fukushima Regional Center for the Japan Environmental and Children’s Study, Hokkaido University, Chiba University - Chiba University Hospital, Chiba University - Chiba University Hospital and Mie National Hospital

Niigata University, Department of Pediatrics, Niigata University, Department of Active Ageing, Niigata Prefectural Office, Department of Health and Welfare, Niigata Prefectural Office, Department of Health and Welfare, Niigata Prefectural Office, Department of Health and Welfare, Niigata Prefectural Office, Department of Health and Welfare, Kashiwazaki Health Care Center, Niigata University, Department of Pediatrics, Niigata University, Department of Pediatrics, Niigata City General Hospital, Department of Pediatrics, Niigata Prefectural Patient Control Center, Pediatric Liaison, Niigata University, Department of International Health (Public Health) and Niigata University