Institution: | 1. Division of Perinatology, Maternal and Perinatal Care Center, Seirei Hamamatsu General Hospital, Hamamatsu, Japan;2. Division of Clinical Research, National Center for Child Health and Development, Tokyo, Japan;3. Perinatal Care Center, Yamaguchi University Hospital, Ube, Japan;4. Department of Fetal-Maternal Medicine, Nagara Medical Center, Gifu, Japan;5. Department of Maternal Fetal and Neonatal Medicine, National Center for Child Health and Development, Tokyo, Japan;6. Department of Obstetrics, Miyagi Children's Hospital, Sendai, Japan;7. Department of Pediatrics, Tokyo Metropolitan Komagome Hospital, Tokyo, Japan |