[1] Baylor Coll Med, Texas Childrens Hosp Heart Ctr, Dept Pediat, Sect Cardiol, Houston, TX 77030 USA
[2] Ann & Robert H Lurie Childrens Hosp Chicago, Heart Ctr, Chicago, IL 60611 USA
[3] Massachusetts Gen Hosp, Adult Congenital Heart Dis Program, Boston, MA 02114 USA
[4] Family Hlth Ctr, Louisville, KY USA
[5] Childrens Hlth Childrens Med Ctr, Phys Org & Acad Relat, Dallas, TX USA
[6] Harvard Med Sch, Dept Pediat, Boston Childrens Hosp, Dept Cardiol, Boston, MA USA
[7] Univ Michigan, Sch Med, Dept Pediat, Div Pediat Cardiol, Ann Arbor, MI USA