Affiliation: | a Department of Anesthesia, Deutsches Herzzentrum, Berlin, Germany b Department of Cardiothoracic and Vascular Surgery, Deutsches Herzzentrum, Berlin, Germany c Department of Perfusion, Deutsches Herzzentrum, Berlin, Germany d Department of Anesthesia, Duke University Medical Center, Durham, NC e Gaston Memorial Hospital, Gastonia, NC |