1. Fukushima Regional Center for the Japan Environment and Children's Study, Fukushima, Japan.
2. Department of Obstetrics and Gynecology, Fukushima Medical University School of Medicine, Fukushima, Japan.
3. Department of Obstetrics and Gynecology, Shirakawa Kosei General Hospital, Fukushima, Japan.
4. Department of Obstetrics and Gynecology, Ota Nishinouchi Hospital, Fukushima, Japan.
5. Center for Birth Cohort Studies, University of Yamanashi, Yamanashi, Japan.
6. Department of Pediatrics, Fukushima Medical University School of Medicine, Fukushima, Japan.
7. Department of Public Health, Fukushima Medical University School of Medicine, Fukushima, Japan.
8. Department of Health Sciences, School of Medicine, University of Yamanashi, Yamanashi, Japan.
9. Fukushima Medical Center for Children and Women, Fukushima Medical University, Fukushima, Japan.