[1] Brigham & Womens Hosp, Boston, MA 02115 USA
[2] Baker Heart Inst, Wynn Dept Metab Cardiol, Melbourne, Vic, Australia
[3] Western Infirm & Associated Hosp, Glasgow, Lanark, Scotland
[4] Duke Univ, Med Ctr, Duke Clin Res Inst, Durham, NC USA
[5] Rigshosp, DK-2100 Copenhagen, Denmark
[6] Univ Western Ontario, London, ON, Canada
[7] Univ Calgary, Calgary, AB, Canada
[8] Cardiac Ctr Louisiana, Shreveport, LA USA
[9] Brigham & Womens Hosp, Boston, MA 02115 USA