1. University of Cologne, Faculty of Medicine and University Hospital of Cologne, Department of Anaesthesiology and Intensive Care Medicine , Cologne , Germany
2. University of Cologne, Faculty of Medicine and University Hospital of Cologne, Department II of Internal Medicine and Center for Molecular Medicine Cologne , Cologne , Germany
3. University of Cologne, Faculty of Medicine and University Hospital of Cologne, Department of Dermatology , Cologne , Germany
4. University of Cologne, Faculty of Medicine and University Hospital of Cologne, Institute of Transfusion Medicine , Cologne , Germany
5. CECAD, University of Cologne, Faculty of Medicine and University Hospital Cologne , Cologne , Germany
6. University of Witten/Herdecke, Anaesthesiology II, Kliniken der Stadt Köln gGmbH, Department of Anaesthesiology and Intensive Care Medicine , Merheim Medical Center, Cologne , Germany