1. Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen , Blegdamsvej 3, BDK-2200 Copenhagen , Denmark
2. Gottfried Schatz Research Center, Division of Medical Physics & Biophysics, Medical University of Graz , Neue Stiftingtalstraße 6, 8010 Graz , Austria
3. Department of Cardiology, Maastricht University Medical Centre and Cardiovascular Research Institute Maastricht, Maastricht University , Universiteitssingel 50, 6229 ER, Maastricht , The Netherlands