[1] Abbott Northwestern, Ctr Coronary Artery Dis, Minneapolis Heart Inst, Minneapolis, MN USA
[2] Abbott Northwestern, Minneapolis Heart Inst Fdn, Minneapolis, MN USA
[3] Massachusetts Gen Hosp, Intervent Cardiol Dept, Boston, MA 02114 USA
[4] Houston Methodist Hosp, Intervent Cardiol Dept, Houston, TX 77030 USA