[1] Dartmouth Hitchcock Med Ctr, Sect Cardiac Surg, Heart & Vasc Ctr, Lebanon, NH 03766 USA
[2] Piedmont Heart Inst, Dept Cardiovasc Surg, Marcus Valve Ctr, Atlanta, GA USA
[3] Univ Colorado Anschutz Med Ctr, Div Cardiothorac Surg, Aurora, CO USA
[4] Northwestern Mem Hosp, Div Cardiac Surg, Chicago, IL 60611 USA
[5] Univ Michigan, Dept Cardiac Surg, Ann Arbor, MI 48109 USA
[6] Washington Univ, Med Ctr, Div Cardiothorac Surg, St Louis, MO USA
[7] Mayo Clin, Dept Anesthesia, Rochester, MN USA
[8] Mayo Clin, Dept Cardiovasc Surg, Rochester, MN USA
[9] Emory Univ, Med Ctr, Dept Cardiothorac Surg, Atlanta, GA 30322 USA
[10] Univ Pittsburgh, Med Ctr, Dept Cardiothorac Surg, Pittsburgh, PA USA
[11] Einstein Healthcare Network, Dept Cardiothorac Surg, Philadelphia, PA USA
[12] Med Ctr Aurora, Dept Cardiothorac Surg, Aurora, CO USA
[13] Univ Republ Uruguay, Dept Cardiac Surg, Montevideo, Uruguay
[14] Virginia Commonwealth Univ, Pauley Heart Ctr, Div Cardiothorac Surg, Richmond, VA USA
[15] Ascens Med Grp, Dept Cardiothorac Surg, Indianapolis, IN USA
[16] Cleveland Clin, Dept Thorac & Cardiovasc Surg, Cleveland, OH 44106 USA