[1] Cardiol Care Children, 1834 Oregon Pike,Ste 20, Lancaster, PA 17601 USA
[2] Mayo Clin, Div Pediat Cardiol, Rochester, MN USA
[3] Mayo Clin, Div Cardiovasc Dis, Rochester, MN USA
[4] Thomas Jefferson Univ, Nemours Alfred I duPont Hosp Children Cardiac Ctr, Sidney Kimmel Med Coll, Wilmington, DE USA
[5] Childrens Hosp, Dept Cardiothorac Surg & Pediat, Dallas, TX USA
[6] Univ Texas Southwestern Med Ctr Dallas, Dallas, TX 75390 USA
[7] Univ Florida, Dept Pediat, Congenital Heart Ctr, Gainesville, FL USA
[8] Childrens Natl Hosp, Div Cardiol, Washington, DC USA
[9] Seattle Childrens Hosp, Seattle, WA USA
[10] Univ Washington, Seattle, WA 98195 USA
[11] Ann & Robert H Lurie Childrens Hosp Chicago, Div Cardiol, Chicago, IL 60611 USA
[12] Northwestern Univ, Dept Pediat, Feinberg Sch Med, Chicago, IL 60611 USA
[13] Hosp Sick Children, Cardiac Diagnost & Intervent Unit, Toronto, ON, Canada
[14] Childrens Hosp Philadelphia, Div Cardiothorac Surg, Philadelphia, PA 19104 USA
[15] Cleveland Clin, Dept Pediat Cardiol, Cleveland, OH 44106 USA
[16] Texas Childrens Hosp, Baylor Coll Med, Dept Pediat, Lillie Frank Abercrombie Sect Cardiol, Houston, TX 77030 USA
[17] Amer Coll Cardiol, Washington, DC USA
[18] Amer Acad Pediat, Itasca, IL USA
[19] Univ Hosp Rainbow Babies & Childrens Hosp, Div Pediat Cardiol, Congenital Heart Collaborat, Cleveland, OH USA
[20] Univ Texas Dell Med Sch Dell Childrens Med Ctr, Texas Ctr Pediat & Congenital Heart Dis, Austin, TX USA