[1] Univ Utah, Intermt Primary Childrens Hosp, Salt Lake City, UT USA
[2] Northwestern Univ, Feinberg Sch Med, Ann & Robert H Lurie Childrens Hosp Chicago, Chicago, IL USA
[3] Med Univ South Carolina, Shawn Jenkins Childrens Hosp, Dept Pediat, Div Pediat Cardiol, Charleston, SC USA
[4] Harvard Med Sch, Boston Childrens Hosp, Boston, MA USA
[5] Univ Iowa Hosp & Clin, Carver Coll Med, Iowa City, IA USA
[6] Atlantic Hlth Syst, Goryeb Childrens Hosp, Div Pediat Cardiol, Morristown, NJ USA
[7] Columbia Univ, Div Pediat Cardiol, Irving Med Ctr, New York, NY USA
[8] Imperial Coll London, Royal Brompton & Hare field Hosp, Sch Med, London, England
[9] Harvard Med Sch, Massachusetts Gen Hosp, Boston, MA USA
[10] Kings Coll London, Sch Biomed Engn & Imaging Sci, London, England
[11] Univ Utah, Intermt Primary Childrens Hosp, Dept Pediat, 100 N Mario Capecchi Dr, Salt Lake City, UT 84113 USA