[1] Oregon Hlth & Sci Univ, Knight Cardiovasc Inst, Portland, OR 97201 USA
[2] Regina Gen Hosp, Regina, SK, Canada
[3] Univ Cincinnati, Cincinnati Childrens Hosp Med Ctr, Heart Inst, Coll Med,Dept Pediat, Cincinnati, OH USA
[4] Univ Amsterdam, Med Ctr, Amsterdam, Netherlands
[5] Harvard Med Sch, Boston Childrens Hosp, Dept Pediat, Boston, MA USA
[6] Harvard Med Sch, Brigham & Womens Hosp, Dept Med, Div Cardiol, Boston, MA USA
[7] Royal Melbourne Hosp, Dept Med, Melbourne, Vic, Australia
[8] Royal Prince Alfred Hosp, Sydney, NSW, Australia
[9] Ochsner Med Ctr, New Orleans, LA USA
[10] Childrens Hosp Wisconsin, Milwaukee, WI USA
[11] Montreal Heart Inst, Montreal, PQ, Canada
[12] Univ Missouri Kansas City, Kansas City, MO USA
[13] St Lukes Hosp, Chesterfield, MO USA
[14] Childrens Hosp, Omaha, NE USA
[15] Univ Nebraska Med Ctr, Omaha, NE USA
[16] Erasmus MC, Rotterdam, Netherlands
[17] Univ Gothenburg, Sahlgrenska Acad, Inst Med, Gothenburg, Sweden
[18] Univ Washington, Med Ctr, Seattle, WA USA
[19] Seattle Childrens Hosp, Seattle, WA USA
[20] Colorado Univ, Sch Med, Denver, CO USA
[21] Univ Calif Los Angeles, Med Ctr, Los Angeles, CA USA
[22] Providence Spokane, Spokane, WA USA
[23] Hosp Univ Virgen Del Rocio, Seville, Spain
[24] Univ Sydney, Sydney, NSW, Australia
[25] Royal Prince Alfred Hosp, Sydney, NSW, Australia
[26] Univ Alberta, Edmonton, AB, Canada
[27] Stanford Univ, Sch Med, Dept Pediat, Palo Alto, CA USA
[28] Stanford Univ, Sch Med, Dept Med, Palo Alto, CA USA
[29] Auckland City Hosp, Green Lane Paediat & Congenital Cardiac Serv, Auckland, New Zealand
[30] Monaldi Hosp, Naples, Italy
[31] Childrens Natl Hosp, Washington, DC USA
[32] Univ Hosp Motol, Prague, Czech Republic
[33] Univ Michigan, Med Ctr, Ann Arbor, MI USA
[34] Emory Univ Hosp, Atlanta, GA USA
[35] Univ British Columbia, St Pauls Hosp, Div Cardiol, Vancouver, BC, Canada
[36] Johns Hopkins Univ, Baltimore, MD USA
[37] Univ Chicago, Chicago, IL USA