1. Department of Public Health, Faculty of Medicine, University of Toyama, Toyama, Japan
2. Toyama Regional Center for JECS, University of Toyama, Toyama, Japan
3. Department of Pediatrics, Faculty of Medicine, University of Toyama, Toyama, Japan
4. Department of Obstetrics and Gynecology, Faculty of Medicine, University of Toyama, Toyama, Japan
5. Nagoya City University, Nagoya, Japan
6. National Institute for Environmental Studies, Tsukuba, Japan
7. National Center for Child Health and Development, Tokyo, Japan
8. Hokkaido University, Sapporo, Japan
9. Tohoku University, Sendai, Japan
10. Fukushima Medical University, Fukushima, Japan
11. Chiba University, Chiba, Japan
12. Yokohama City University, Yokohama, Japan
13. University of Yamanashi, Chuo, Japan
14. University of Toyama, Toyama, Japan
15. Kyoto University, Kyoto, Japan
16. Osaka University, Suita, Japan
17. Hyogo College of Medicine, Nishinomiya, Japan
18. Tottori University, Yonago, Japan
19. Kochi University, Nankoku, Japan
20. University of Occupational and Environmental Health, Kitakyushu, Japan
21. Kumamoto University, Kumamoto, Japan