1. Institute for Surgical Research and Department of Cardiology, Oslo University Hospital and University of Oslo, Rikshospitalet, N-0027 Oslo, Norway
2. Department of Cardiology, CHU Rennes and Inserm, LTSI, University of Rennes, Rennes, France
3. Cardiovascular Center Aalst, OLV Clinic, Moorselbaan 164, 9300 Aalst, Belgium