[1] Temple Univ, Sch Med, Philadelphia, PA 19140 USA
[2] Washington Univ, Sch Med, St Louis, MO 63110 USA
[3] St Louis Childrens Hosp, Cardiac Catheterizat Lab, St Louis, MO 63110 USA
[4] Washington Univ, Sch Med, St Louis, MO 63110 USA
[5] Barnes Jewish Hosp, Cardiac Catheterizat Lab, St Louis, MO 63110 USA