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 Ho, Anthony M.-H. A1 Chui, Po T. A1 Lee, Alex P. W. A1 Wan, Song YR 2014 UL http://www.ccjm.org/content/81/9/517.abstract AB