Affiliation: | (1) Department of Perinatology and Gynecology, Kagawa University School of Medicine, 1750-1 Ikenobe, Miki Kagawa, 761-0793, Japan;(2) Department of Obstetrics and Gynecology, Mitoyo General Hospital, 708 Himehama, Toyohama-cho, Kanonji Kagawa, 769-1695, Japan |