1. Department of Cardiology, Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium
2. Department of Cardiology, Saint-Luc hospital, Université Catholique de Louvain, Brussels, Belgium
3. Laboratory of Physics and Physiology, Université Libre de Bruxelles, Brussels, Belgium
4. Research Centre in Epidemiology, Biostatistics and Clinical Research. School of Public Health. Université Libre de Bruxelles, Brussels, Belgium
5. Department of Cardiology, Sint-Jan, Hospital Bruges, Bruges, Belgium