1. Department of Pharmaceuticals, National Center for Child Health and Development, Tokyo, Japan.
2. Japan Drug Information Institute in Pregnancy, National Center for Child Health and Development, Tokyo, Japan.
3. Division of Obstetrics, Center for Maternal-Fetal, Neonatal and Reproductive Medicine, National Center for Child Health and Development, Tokyo, Japan.
4. Division of Maternal Medicine, Center for Maternal-Fetal, Neonatal and Reproductive Medicine, National Center for Child Health and Development, Tokyo, Japan.