[1] Univ Texas, Sch Med, Hlth Sci Ctr, Dept Internal Med, Houston, TX 77030 USA
[2] Univ Texas, Sch Med, Dept Endocrinol, Houston, TX 77030 USA
[3] Univ Texas, Sch Med, Dept Cardiothorac & Vasc Surg, Houston, TX 77030 USA
[4] Univ Texas, Sch Med, Div Cardiol, Houston, TX 77030 USA