[1] Univ Munich, Klinikum Grosshadern, Dept Cardiac Surg, D-81377 Munich, Germany
[2] Univ Munich, Klinikum Grosshadern, Inst Surg Res, D-81377 Munich, Germany
[3] Univ Munich, Klinikum Grosshadern, Inst Anesthesiol, D-81377 Munich, Germany
[4] Univ Munich, Klinikum Grosshadern, Inst Pathol, D-81377 Munich, Germany
[5] Univ Munich, Klinikum Grosshadern, Inst Clin Chem, D-81377 Munich, Germany