1. From the Department of Anesthesiology (H.P.G., G.B.M., A.M.G., J.M., J.G.R., B.P-B., M.F.N.), Division of Cardiothoracic Anesthesiology and Critical Care Medicine, and Department of Surgery (P.K.S.), Division of Cardiothoracic Surgery, Duke University Medical Center, Durham, NC.