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