[1] Columbia Univ, Dept Pediat, Div Pediat Cardiol, Morgan Stanley Childrens Hosp NewYork Presbyteria, New York, NY 10027 USA
[2] Harvard Med Sch, Brigham & Womens Hosp, Div Maternal Fetal Med, Dept OB GYN, Boston, MA 02115 USA
[3] Harvard Med Sch, Massachusetts Gen Hosp, Div Pediat Cardiol, Dept Pediat, Boston, MA 02115 USA
[4] Boston Childrens Hosp, Dept Cardiol, Boston, MA USA
[5] NYU, Dept Pediat, Div Pediat Cardiol, Langone Med Ctr, New York, NY 10016 USA
[6] Univ Rochester, Dept Pediat, Div Pediat Cardiol, Golisano Childrens Hosp, Rochester, NY USA
[7] Univ Kentucky, Dept Pediat, Div Pediat Cardiol, Kentucky Childrens Hosp, Lexington, KY USA
[8] Texas Childrens Hosp, Baylor Coll Med, Dept Pediat, Div Pediat Cardiol, Houston, TX 77030 USA
[9] Univ Calif San Diego, Rady Childrens Hosp San Diego, Dept Pediat, Div Pediat Cardiol, San Diego, CA 92103 USA
[10] Univ Autonoma Barcelona, Univ Hosp Vall dHebron, Dept Pediat, Div Pediat Cardiol, Barcelona, Spain
[11] Hosp Coracao Assoc Sanatorio Sirio, Inst Dante Pazzanese Cardiol, Div Pediat Cardiol, Dept Pediat, Sao Paulo, Brazil
[12] Harvard Med Sch, Boston Childrens Hosp, Dept Cardiol, Boston, MA 02115 USA