[1] Univ Alberta, Cardiol WMC 2C2, Div Cardiol, Edmonton, AB T6G 2B7, Canada
[2] Duke Univ, Med Ctr, Duke Clin Res Inst, Durham, NC USA
[3] Cleveland Clin Fdn, Dept Cardiovasc Med, Kaufman Ctr Heart Failure, Lerner Coll Med, Cleveland, OH 44195 USA
[4] Baylor Heart & Vasc Inst, Dallas, TX USA
[5] Univ Calif San Francisco, San Francisco VA Hosp, San Francisco, CA 94143 USA
[6] Univ Florida, Coll Med, Div Cardiovasc Med, Gainesville, FL USA
[7] Monash Univ, Alfred Hosp, Melbourne, Vic 3181, Australia
[8] Inst Cardiovasc Rosario, Rosario, Santa Fe, Argentina
[9] Mil Hosp, Dept Cardiol, Wroclaw, Poland
[10] Univ Brescia, Dept Expt & Appl Med, Sect Cardiovasc Dis, Brescia, Italy
[11] Dalhousie Univ, Div Cardiol, Halifax, NS, Canada
[12] Johnson & Johnson Inc, Mountain View, CA USA
[13] Univ Calif Los Angeles, David Geffen Sch Med, Div Cardiol, Los Angeles, CA 90095 USA