[1] Johns Hopkins Univ, Sch Med, Dept Surg, Div Cardiac Surg, Baltimore, MD 21205 USA
[2] Johns Hopkins All Childrens Hosp, Johns Hopkins All Childrens Heart Inst, Dept Surg, Div Cardiovasc Surg, Tampa, FL USA
[3] Harvard Med Sch, Childrens Hosp Boston, Boston, MA USA
[4] Duke Univ, Durham, NC USA
[5] Univ Louisville, Norton Childrens Hosp, Louisville, KY USA
[6] Univ Michigan, CS Mott Childrens Hosp, Ann Arbor, MI USA
[7] Childrens Hosp, Childrens Heart Clin, Minneapolis, MN USA
[8] Clin Minnesota, Minneapolis, MN USA
[9] Univ Missouri, Dept Surg, Sch Med, Kansas City, MO USA
[10] Phoenix Childrens Hosp, Div Pediat Cardiac Surg, Phoenix, AZ USA
[11] Nemours Alfred I duPont Hosp, Wilmington, DE USA
[12] Soc Thorac Surg, Chicago, IL USA
[13] McGill Univ, Montreal Childrens Hosp, Dept Surg, Div Cardiothorac Surg, Montreal, PQ, Canada
[14] Northwestern Univ Feinberg Sch Med, Ann Robert H Lurie Childrens Hosp Chicago, Chicago, IL USA
[15] Baylor Coll Med, Texas Childrens Hosp, Houston, TX USA
[16] Cincinnati Childrens Hosp Med Ctr, Inst Heart, Cincinnati, OH 45229 USA
[17] Great Ormond St Hosp Sick Children, London, England
[18] Wayne State Univ, Sch Med, Childrens Hosp Michigan, Detroit, MI USA
[19] Childrens Natl Med Ctr, Washington, DC 20010 USA
[20] Univ Michigan, Ann Arbor, MI 48109 USA
[21] Massachusetts Gen Hosp, Harvard Med Sch, Boston, MA 02114 USA