作者单位：Department of Anesthesiology, University of Michigan, 4172 Cardiovascular Center, 1500 E. Medical[1]Outcomes Research Unit, American University of Beirut, Beirut, Lebanon[2]Department of Cardiothoracic and Vascular Surgery, University of Toledo, Toledo, OH, United States[3]Department of Anesthesiology, Mercy St. Vincent Medical Center, Toledo, OH, United States[4]
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