[1] MedStar Hlth, Dept Med, Baltimore, MD USA
[2] SUNY Buffalo, Dept Med, Catholic Hlth Syst, Buffalo, NY 14214 USA
[3] Dow Univ Hlth Sci, Dept Med, Karachi, Pakistan
[4] Baylor Coll Med, Dept Med, Sect Cardiovasc Res, Houston, TX USA
[5] Duke Univ, Sch Med, Div Cardiol, Durham, NC USA
[6] Duke Clin Res Inst, Durham, NC USA
[7] St Lukes Mid Amer Heart Inst, Dept Cardiol, Kansas City, MO USA
[8] Univ Mississippi, Med Ctr, Dept Med, Jackson, MS USA
[9] Baylor Scott & White Res Inst, Dallas, TX 75204 USA
[10] Heart Hosp Plano, Plano, TX 75093 USA
[11] Baylor Coll Med, Dept Med, Temple, TX 76508 USA