1. Department of Surgery, Leiden University Medical Center, Leiden, The Netherlands.
2. Department of Cardiothoracic Surgery, Leiden University Medical Center, Leiden, The Netherlands.
3. Institute of Clinical Pharmacology, Hannover Medical School, Hannover, Germany.
4. Department of Cell Biology and Histology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
5. Central Clinical Chemical Laboratory, Leiden University Medical Center, Leiden, The Netherlands.