1 Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo, Japan.
2 Department of Comprehensive Reproductive Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
3 Department of Obstetrics and Gynecology, The University of Tokushima Graduate School, Institute of Health Biosciences, Tokushima, Japan.
4 Division of Reproductive Medicine, Center for Maternal-Fetal-Neonatal and Reproductive Medicine, National Medical Center for Children and Mothers, Tokyo, Japan.
5 Department of Pediatrics, Hamamatsu University School of Medicine, Hamamatsu, Japan.
6 Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo, Japan. fukami-m@ncchd.go.jp.