Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Hanako Taniguchi and Shigeru Aoki and Kentaro Sakamaki and Kentaro Kurasawa and Mika Okuda and Tsuneo Takahashi and Fumiki Hirahara,Circumvallate Placenta: Associated Clinical Manifestations and Complications—A Retrospective Study,Obstetrics and Gynecology International,1687-9589,Hindawi Limited,2014-01-01,2014,,1-5,https://cir.nii.ac.jp/crid/1871428067572068352,https://doi.org/10.1155/2014/986230