1. Department of Cardiology, Clinical Sciences Lund University 221 00 Lund Sweden
2. Faculty of Health, Department of Cardiology Örebro University 702 81 Örebro Sweden
3. Chalmers University of Technology 412 96 Göteborg Sweden
4. Clinical Epidemiology and Biostatistics, School of Medical Sciences Örebro University 702 81 Örebro Sweden
5. Department of Biomedical Engineering Lund University 221 00 Lund Sweden