[1] Cleveland Clin, Dept Thorac & Cardiovasc Surg, Cleveland, OH USA
[2] Columbia Univ, Dept Cardiothorac Surg, New York, NY USA
[3] Hosp Sick Children, Dept Cardiac Surg, Toronto, ON, Canada
[4] Childrens Hosp Philadelphia, Div Cardiothorac Surg, Philadelphia, PA USA
[5] Childrens Hosp Los Angeles, Div Cardiac Surg, Los Angeles, CA USA
[6] Childrens Hosp Georgia, Sect Pediat & Congenital Heart Surg, Augusta, GA USA