[1] Univ Med Ctr Groningen, Congenital Heart Dis, Beatrix Childrens Hosp, NL-9713 AV Groningen, Netherlands
[2] Hosp Sick Children, Div Cardiol, Toronto, ON M5G 1X8, Canada
[3] Great Ormond St Hosp Sick Children, London WC1N 3JH, England
[4] Univ Oklahoma, Hlth Sci Ctr, Oklahoma City, OK USA
[5] Univ Colorado, Denver, CO 80202 USA
[6] Tongji Univ, Shanghai Pulm Hosp, Shanghai 200092, Peoples R China
[7] Hop Necker Enfants Malad, AP HP, Paris, France
[8] Univ Hosp Geneva, Geneva, Switzerland
[9] Columbia Univ Coll Phys & Surg, New York, NY 10032 USA