[1] Beth Israel Deaconess Med Ctr, Intervent Cardiol Sect, Boston, MA 02215 USA
[2] Northwestern Univ, Med Ctr, Div Cardiol, Chicago, IL 60611 USA
[3] Univ Rochester, Med Ctr, Rochester, NY 14642 USA
[4] Brigham & Womens Hosp, Angiograph Core Lab, Boston, MA 02115 USA
[5] St Josephs Hosp, Cardiol Unit, Dept Med, Cardiac Catheterizat Associates, Syracuse, NY USA