%0 Journal Article %A Fernando Morcerf %A Ernesto E. Salcedo %A Wayne Siegel %T Echocardiographic determination of the etiology of severe mitral regurgitation %D 1976 %J Cleveland Clinic Journal of Medicine %P 163-174 %V 43 %N 3 %U https://www.ccjm.org/content/ccjom/43/3/163.full.pdf