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) Patrick T. O’Gara and Michael J. Mack,Secondary Mitral Regurgitation,New England Journal of Medicine,0028-4793,Massachusetts Medical Society,2020-10-08,383,15,1458-1467,https://cir.nii.ac.jp/crid/1360016870118455680,https://doi.org/10.1056/nejmcp1903331