[1] Ctr Hosp Lisboa Cent, Hosp Santa Marta, Dept Pediat Cardiol, Rua Santa Marta 50, P-1150024 Lisbon, Portugal
[2] Texas Childrens Hosp, Baylor Coll Med, Div Pediat Cardiol, Houston, TX 77030 USA
[3] Stanford Univ, Div Pediat Cardiol, Dept Pediat, Lucile Packard Childrens Hosp, Palo Alto, CA 94304 USA
[4] Childrens Hosp Colorado, Div Pediat Cardiol, Aurora, CO USA
[5] Univ Nebraska, Coll Med, Childrens Hosp & Med Ctr, Joint Div Pediat Cardiol, Omaha, NE 68198 USA
[6] Harvard Med Sch, Boston Childrens Hosp, Dept Cardiol, Boston, MA USA
[7] Nova Med Sch, CEDOC Chron Dis, Lisbon, Portugal
[8] Ressonancia Magnet SA, Caselas, Lisbon, Portugal
[9] Inst Super Tecn, Biomed Engn Dept, Lisbon, Portugal