[1] Univ Med & Pharm Carol Davila, Dept Cardiol, Bucharest, Romania
[2] Duke Clin Rsch Inst, Stat Grp, Durham, NC USA
[3] Duke Clin Rsch Inst, Div Cardiol, Dept Med, Durham, NC USA
[4] Duke Clin Rsch Inst, Div Cardiol, Deparement Med, Durham, NC USA
[5] Dante Pazzanese Inst Cardiol, Rsch Div, Sao Paulo, Brazil
[6] ECLA Estudios Cardiol Latinoamer, Dept Cardiol, Rosario, Argentina
[7] Oslo Univ Hosp, Dept Cardiol, Oslo, Norway
[8] Bristol Myers Squibb Co, Princeton, NJ USA
[9] Aarhus Univ Hosp, Dept Cardiol, DK-8000 Aarhus, Denmark
[10] Boston Univ, Med Cntr, Dept Med, Boston, MA 02215 USA
[11] Uppsala Univ, Uppsala Clin Rsch Cntr, Dept Med Sci, Uppsala, Sweden