[1] Massachusetts Gen Hosp, Dept Surg, Boston, MA 02114 USA
[2] Univ Florida, Div Cardiothorac Surg, Jacksonville, FL USA
[3] Univ Colorado, Hlth Sci Ctr, Dept Surg, Denver, CO 80262 USA
[4] Congenital Heart Inst Florida, St Petersburg, FL USA
[5] Univ Michigan, Ctr Hlth, Div Adult Cardiac Surg, Ann Arbor, MI 48109 USA
[6] Midatlantic Cardiothorac Surg, Norfolk, VA USA
[7] Cardiothorac Surg Associates N Texas, Dallas, TX USA