[1] Midwest Heart Fdn, Lombard, IL USA
[2] Hosp Sick Children, Toronto, ON, Canada
[3] Univ Chicago, Chicago, IL USA
[4] Cleveland Clin Fdn, Cleveland, OH USA
[5] Univ Alberta, Edmonton, AB, Canada
[6] Inova Fairfax Hosp, Fairfax, VA USA
[7] Ochsner Clin & Alton Ochsner Med Fdn, New Orleans, LA USA
[8] Osped Niguarda Ca Granda, Milan, Italy
[9] Univ Alabama Birmingham, Birmingham, AL USA
[10] Osped Pediat Bambino Gesu, Rome, Italy
[11] Freeman Rd Hosp, Newcastle Upon Tyne, Tyne & Wear, England
[12] Univ Munich Grosshaden, Munich, Germany
[13] Newark Beth Israel Med Ctr, Newark, NJ USA
[14] Duke Univ Med Ctr, Durham, NC USA
[15] Heidelberg Univ, Heidelberg, Germany
[16] Minneapolis Heart Inst, Minneapolis, MN USA
[17] Intermt Med Ctr, Murray, UT USA
[18] Cedar Sinai Heart Inst, Los Angeles, CA USA
[19] Univ Pittsburgh, Pittsburgh, PA USA
[20] Univ Utah, Salt Lake City, UT USA
[21] Univ Maryland, Baltimore, MD USA
[22] Univ Vienna, Vienna, Austria
[23] Stanford Univ, Palo Alto, CA USA
[24] Great Ormond St Hosp Sick Children, London, England
[25] Advoc Christ Med Ctr, Oak Lawn, IL USA
[26] St Louis Childrens Hosp, St Louis, MO USA
[27] Loma Linda Univ Childrens Hosp, Loma Linda, CA USA
[28] Hosp Univ A Coruna, La Coruna, Spain
[29] Texas Heart Inst, Houston, TX USA
[30] Katholieke Univ Leuven, Leuven, Belgium
[31] Northwestern Univ, Chicago, IL USA
[32] Univ Wisconsin, Madison, WI USA
[33] Montefiore Med Ctr, New York, NY USA
[34] Ist Clin Humanitas, Rozzano, Italy
[35] Mt Sinai Med Ctr, New York, NY USA
[36] Cincinnati Childrens Hosp, Cincinnati, OH USA
[37] Univ Colorado, Denver, CO USA
[38] Univ Toronto, Toronto, ON, Canada
[39] Drexler Univ Coll Med, Philadelphia, PA USA
[40] Univ Pennsylvania, Philadelphia, PA USA
[41] Mayo Clin, Jacksonville, FL USA
[42] St Vincent Hosp, Sydney, NSW, Australia
[43] Papworth Hosp, Cambridge, England
[44] St Joseph Hosp, Atlanta, GA USA
[45] Johns Hopkins Univ Hosp, Baltimore, MD USA
[46] Univ Hosp Gasthuisberg, Leuven, Belgium