[1] McAllen Med Ctr, Dept Anesthesiol, McAllen, TX USA
[2] Fletcher Allen Hlth Care, Div Cardiothorac Surg, Burlington, VT USA
[3] Fletcher Allen Hlth Care, Div Cardiol, Burlington, VT USA
[4] Fletcher Allen Hlth Care, Dept Anesthesiol, Burlington, VT USA
[5] Univ Vermont, Burlington, VT USA
[6] Englewood Hosp & Med Ctr, Div Cardiothorac Surg, Englewood, NJ USA
[7] Englewood Hosp & Med Ctr, Div Cardiol, Englewood, NJ USA
[8] Univ Portland, Dept Cardiothorac Surg, Portland, OR 97203 USA