[1] Icahn Sch Med Mt Sinai, Pediat, Mt Sinai Med Ctr, Congenital Pediat & Fetal Echocardiog, New York, NY 10029 USA
[2] Rady Childrens Hosp San Diego, Pediat Clin, Radiol, San Diego, CA USA
[3] Univ Calif San Diego, Echocardiog & Non Invas Cardiac Imaging, La Jolla, CA 92093 USA
[4] Harvard Univ, Sch Med, Pediat, Cambridge, MA 02138 USA
[5] Boston Childrens Hosp, Div Noninvas Cardiac Imaging, Dept Cardiol, Boston, MA USA
[6] Boston Childrens Hosp, Program Pediat Cardiol & Cardiovasc Res, Boston, MA USA
[7] Harvard Univ, Sch Med, Pediat, Cambridge, MA 02138 USA
[8] Univ Missouri, Pediat, Columbia, MO 65211 USA
[9] Childrens Hosp Philadelphia, Pediat Pathol, Lab Med, Philadelphia, PA USA
[10] Univ Penn, Sch Med, Pediat Cardiol, Philadelphia, PA 19104 USA
[11] Childrens Hosp Los Angeles, Echocardiog, Los Angeles, CA USA
[12] Univ So Calif, Pediat, Los Angeles, CA 90089 USA