RT Journal Article SR Electronic T1 Caseous calcification of the mitral annulus: an underappreciated variant JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 388 OP 388 DO 10.1136/hrt.2003.023010 VO 90 IS 4 A1 G M Novaro A1 B P Griffin A1 D F Hammer YR 2004 UL http://heart.bmj.com/content/90/4/388.abstract AB