[1] Univ Texas, Sch Med, Houston, TX USA
[2] Minneapolis Heart Inst Fdn, Hypertroph Cardiomyopathy Ctr, Minneapolis, MN USA
[3] Tufts Univ, Sch Med, Boston, MA 02111 USA
[4] Baylor Univ, Med Ctr, Baylor Heart & Vasc Inst, Dallas, TX USA
[5] Baylor Hlth Care Syst, A Webb Roberts Ctr CME, Dallas, TX USA