[1] Columbia Univ, Irving Med Ctr, Morgan Stanley Childrens Hosp, Div Pediat Cardiol,NewYork Presbyterian, New York, NY USA
[2] Univ Southern Calif, Dept Surg, Keck Sch Med, Los Angeles, CA USA
[3] Childrens Hosp New Orleans, Sect Pediat Surg, New Orleans, LA USA
[4] Columbia Univ Coll Phys & Surg, Div Cardiothorac Surg, 630 W 168th St, New York, NY 10032 USA
[5] Duke Univ, Med Ctr, Dept Pediat, Duke Clin Res Inst, Durham, NC 27710 USA
[6] Johns Hopkins All Childrens Heart Inst, Div Cardiac Surg, St Petersburg, FL USA
[7] Childrens Hosp & Clin Minnesota, Div Cardiac Surg, Childrens Heart Clin, Minneapolis, MN USA
[8] Harvard Med Sch, Dept Cardiol, Boston Childrens Hosp, Dept Pediat, Boston, MA 02115 USA
[9] NYU, Robert F Wagner Grad Sch Publ Serv, New York, NY 10003 USA