1. Department of Cardiovascular Medicine, University Hospitals Leuven, Leuven, Belgium;
2. Department of Internal Medicine and Department of Cardiology, Centre Hospitalier Jolimont, Haine St. Paul, Belgium;
3. Department of Cardiovascular Diseases, Université Catholique de Louvain, Cliniques Universitaires St-Luc, Brussels, Belgium.
4. Department of Cardiology, Ghent University Hospital, Gent, Belgium;
5. Department of Public Health, Ghent University, Gent, Belgium;
6. Department of Cardiovascular Surgery, University Hospital (CHU, ULg) of Liège, Liège, Belgium;
7. Department of Cardiology, Ziekenhuis Oost-Limburg, Genk, Belgium;
8. Department of Cardiology, Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium;
9. Department of Cardiology, Antwerp University Hospital, Edegem, Belgium;