1. Department of Cardiology, Ziekenhuis Oost-Limburg, Genk, Belgium (W.M., P.M.).
2. Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, Diepenbeek, Belgium (W.M.).
3. Doctoral School for Medicine and Life Sciences, Hasselt University, Diepenbeek, Belgium (P.M.).