PT - JOURNAL ARTICLE AU - Fernando Morcerf AU - Ernesto E. Salcedo AU - Wayne Siegel TI - Echocardiographic determination of the etiology of severe mitral regurgitation DP - 1976 Sep 21 TA - Cleveland Clinic Journal of Medicine PG - 163--174 VI - 43 IP - 3 4099 - http://www.ccjm.org/content/43/3/163.short 4100 - http://www.ccjm.org/content/43/3/163.full SO - Cleve Clin J Med1976 Sep 21; 43