RT Journal Article SR Electronic T1 Hypertrophic cardiomyopathy apical variant JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 517 OP 519 DO 10.3949/ccjm.81a.13127 VO 81 IS 9 A1 Anthony M.-H. Ho A1 Po T. Chui A1 Alex P. W. Lee A1 Song Wan YR 2014 UL http://www.ccjm.org/content/81/9/517.abstract AB