1 Department of Pharmacy, National Center for Child Health and Development, Tokyo, Japan. saito-jn@ncchd.go.jp.
2 Division of Maternal Medicine, Center for Maternal-Fetal, Neonatal and Reproductive Medicine, National Center for Child Health and Development, Tokyo, Japan.
3 Japan Drug Information Institute in Pregnancy, National Center for Child Health and Development, Tokyo, Japan.
4 Department of Pharmacy, National Center for Child Health and Development, Tokyo, Japan.
5 Division of Obstetrics, Center for Maternal-Fetal, Neonatal and Reproductive Medicine, National Center for Child Health and Development, Tokyo, Japan.