[1] Univ Calif Los Angeles, Med Ctr, Cardiomyopathy Ctr, Los Angeles, CA 90095 USA
[2] Duke Univ, Med Ctr, Durham, NC 27706 USA
[3] Univ Calif San Diego, Med Ctr, San Diego, CA 92103 USA
[4] Univ Texas, SW Med Ctr, Dallas, TX 75216 USA
[5] Ohio State Univ, Div Cardiol, Columbus, OH 43210 USA
[6] Northwestern Univ, Feinberg Sch Med, Evanston, IL 60208 USA
[7] Duke Univ, Med Ctr, Duke Clin Res Inst, Durham, NC 27706 USA
[8] Cleveland Clin Fdn, George M & Linda H Kaufman Ctr Heart Failure, Cleveland, OH 44195 USA
[9] Cleveland Clin Fdn, Dept Cardiovasc Med, Heart Failure Sect, Cleveland, OH 44195 USA
[10] Campbell Univ, Sch Pharm, Dept Clin Res, Res Triangle Pk, NC USA
[11] Duke Clin Res Inst, Durham, England