1. Antwerp University Hospital, Antwerp, Belgium;
2. Ziekenhuis Oost-Limburg, Genk, Belgium;
3. Biomedical Research Institute, Hasselt University, Hasselt, Belgium;
4. AZ Sint-Jan Ziekenhuis, Brugge, Belgium;
5. Cardiologisch Centrum Grens, Kalmthout, Belgium;
6. Cliniques Universitaires Saint-Luc, Brussels, Belgium