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) Kimberly Butt and Ken Lim and Stephen Bly and Yvonne Cargill and Greg Davies and Nanette Denis and Gail Hazlitt and Lucie Morin and Annie Ouellet and Shia Salem,RETIRED: Determination of Gestational Age by Ultrasound,Journal of Obstetrics and Gynaecology Canada,1701-2163,Elsevier BV,2014-02,36,2,171-181,https://cir.nii.ac.jp/crid/1360011144318218624,https://doi.org/10.1016/s1701-2163(15)30664-2