[1] Hennepin Cty Med Ctr, Dept Cardiovasc Med, Minneapolis, MN 55415 USA
[2] Hennepin Cty Med Ctr, Dept Internal Med, Minneapolis, MN 55415 USA
[3] Henry Ford Hlth Syst, Div Cardiol, Detroit, MI USA
[4] Eastern Hlth Mem Univ Newfoundland, St John, NL, Canada
[5] Abbott NW Hosp, Minneapolis Heart Inst, Minneapolis, MN USA
[6] Abbott NW Hosp, Minneapolis Heart Inst Fdn, Minneapolis, MN USA
[7] Abbott Northwestern, Minneapolis Heart Inst, Ctr Coronary Artery Dis, Minneapolis, MN USA
[8] Abbott Northwestern, Minneapolis Heart Inst Fdn, Minneapolis, MN USA