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) BENJAMIN EJ,Mitral annular calcification and the risk of stroke in an elderly cohort,N Engl J Med,,,1992,327,,374-379,https://cir.nii.ac.jp/crid/1572543025116183936,