1. Anesthetist, Department of Anesthesiology, University Hospital Aachen, Aachen, Germany.
2. † Resident, Department of Anesthesiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
3. Cardiologist, Department of Cardiology, University Hospital Aachen.
4. Anesthetist, Department of Cardiac Surgery, University Hospital Aachen.
5. Research Assistant, Department of Anesthesiology, University Hospital Aachen.
6. Professor, Department of Anesthesiology, University Hospital Aachen.
7. Associate Professor, Department of Cardiothoracic Surgery, Leiden University Medical Center, Leiden, The Netherlands.