Department of Anesthesiology, Duke University Medical Center, Durham, North Carolina; Duke Clinical Research Institute, Durham, North Carolina. Electronic address: nathan.waldron@dm.duke.edu. Department of Anesthesiology, Duke University Medical Center, Durham, North Carolina. Department of Surgery (Cardiothoracic Surgery), Duke University Medical Center, Durham, North Carolina. Department of Surgery (Cardiothoracic Surgery), Duke University Medical Center, Durham, North Carolina; Department of Immunology, Duke University Medical Center, Durham, North Carolina; Department of Pathology, Duke University Medical Center, Durham, North Carolina. Duke Clinical Research Institute, Durham, North Carolina; Department of Medicine (Cardiology), Duke University Medical Center, Durham, North Carolina. Department of Anesthesiology, Duke University Medical Center, Durham, North Carolina; Duke Clinical Research Institute, Durham, North Carolina.