著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Junichi Hasegawa and Masamitsu Nakamura and Takashi Okai and Akihiko Sekizawa and Kiyotake Ichizuka and Ryu Matsuoka and Shoko Hamada,Ultrasonographic findings of placenta lacunae and a lack of a clear zone in cases with placenta previa and normal placenta,Prenatal Diagnosis,0197-3851,Wiley,2011-07-29,31,,1062-1065,https://cir.nii.ac.jp/crid/1870020693149587584,https://doi.org/10.1002/pd.2833