title: Frequency and importance of the senile changes of the mitral valve.
mesh_terms: D000368:Aged; D000375:Aging; D002114:Calcinosis / Q000453:epidemiology*; D005260:Female; D006801:Humans; D007087:Illinois; D008297:Male; D008875:Middle Aged; D008945:Mitral Valve Prolapse / Q000453:epidemiology*