1. Department of Neonatal Medicine Osaka Women's and Children's Hospital Osaka Japan
2. Osaka Maternal and Child Health Information Center Osaka Women's and Children's Hospital Osaka Japan
3. Public Health, Department of Social Medicine Osaka University Graduate School of Medicine Osaka Japan
4. Department of Obstetrics and Gynecology Osaka University Graduate School of Medicine Osaka Japan
5. Department of Pediatrics Osaka University Graduate School of Medicine Osaka Japan
6. Osaka Regional Center for Japan Environment and Children's Study (JECS) Osaka University Osaka Japan
7. Institute for Global Health Policy Research, Bureau of International Health Cooperation National Center for Global Health and Medicine Tokyo Japan