1. Department of Cardiology, Ziekenhuis Oost-Limburg, Genk, Belgium (P.N., P.M., M.D., W.M.).
2. Doctoral School for Medicine and Life Sciences, Hasselt University, Diepenbeek, Belgium (P.N., P.H., P.M.).
3. Biomedical Research Institute and Transnational University Limburg, School of Life Sciences, Hasselt University, Belgium (P.H., I.L., J.-P.N., W.M., M.O.).
4. Department of Cardiovascular Medicine, Heart and Vascular Institute, Cleveland Clinic, OH (W.H.W.T.).