[1] Harvard Univ, Brigham & Womens Hosp, Sch Med, Cardiovasc Imaging Program,Dept Radiol, Boston, MA 02115 USA
[2] Harvard Univ, Brigham & Womens Hosp, Sch Med, Cardiovasc Imaging Program,Dept Med, Boston, MA 02115 USA
[3] Harvard Univ, Brigham & Womens Hosp, Sch Med, Div Cardiovasc Med,Dept Med, Boston, MA 02115 USA
[4] Harvard Univ, Brigham & Womens Hosp, Sch Med, Div Nucl Med & Mol Imaging,Dept Radiol, Boston, MA 02115 USA
[5] Boston Childrens Hosp, Dept Cardiol, Boston, MA USA
[6] Harvard Univ, Sch Med, Dept Pediat, Cambridge, MA 02138 USA
[7] Boston Univ, Sch Med, Boston Med Ctr, Sect Cardiovasc Med,Evans Dept Med, Boston, MA 02215 USA