1. Laboratory of Experimental Cardiology, University Medical Center Utrecht, P.O. Box 85500, 3508 GA, Utrecht, The Netherlands
2. Department of Surgery, Leiden University Medical Center, P.O. Box 9600, 2300 RC, Leiden, The Netherlands
3. Einthoven Laboratory of Experimental Vascular Medicine, Leiden University Medical Center, P.O. Box 9600, 2300 RC, Leiden, The Netherlands
4. Interuniversity Cardiology Institute of the Netherlands, P.O. Box 19258, 3501 DG, Utrecht, The Netherlands