1 Department of Anesthesiology, Mercy St. Vincent Medical Center, Toledo, OH; Department of Anesthesiology, University of Michigan, 4172 Cardiovascular Center, 1500 E Medical Center Dr, Ann Arbor, MI48109. Electronic address: [email protected].
2 Department of Cardiothoracic Surgery, University of Toledo, Toledo, OH.
3 Clinical Outcomes Unit, American University of Beirut, Beirut, Lebanon.
4 Department of Anesthesiology, University of Michigan, Ann Arbor, MI.
5 Department of Cardiac Surgery, University of Michigan, Ann Arbor, MI.