Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) COHN LH.,Comparative Morbidity of Mitral valve repair versus replacement for mitral regurgitation with and without coronary artery disease,Ann Thorac Surg,,,1988,45,,284-290,https://cir.nii.ac.jp/crid/1570291224605223680,