[1] Baylor Coll Med, Baylor St Lukes Med Ctr, Div Cardiovasc Anesthesiol, Texas Heart Inst, Baylor St, Houston, TX USA
[2] Baylor Coll Med, Ben Taub Hosp, Div Cardiovasc Anesthesiol, Houston, TX USA
[3] Baylor Coll Med, Texas Heart Inst, Dept Anesthesiol, Houston, TX USA
[4] Baylor Coll Med, Baylor St Lukes Med Ctr, Texas Heart Inst, Div Cardiovasc Anesthesiol, Baylor St, MC 1-226, POB 20345, Houston, TX 77225 USA