[1] Duke Univ Hosp, Dept Surg, Durham, NC USA
[2] Duke Univ Hosp, Div Cardiothorac Surg, Durham, NC 27710 USA
[3] Duke Childrens Hosp, Pediat & Congenital Heart Ctr, Durham, NC USA
[4] Duke Univ Hosp, Congenital Heart Surg Res & Training Lab, Durham, NC USA
[5] Duke Univ Hosp, Pediat Heart Surg, 2301 Erwin Rd, DUMC 3474, Durham, NC 27710 USA