1. Department of Cardiology; Ziekenhuis Oost-Limburg; Genk 3600 Belgium
2. Doctoral School for Medicine and Life Sciences; Hasselt University; Diepenbeek Belgium
3. Biomedical Research Institute, Faculty of Medicine and Life Sciences; Hasselt University; Diepenbeek Belgium
4. Department of Cardiovascular Medicine, Heart and Vascular Institute; Cleveland Clinic; Cleveland OH USA