1. Department of Cardiology, Linköping University Hospital , Linköping , Sweden
2. Department of Health, Medicine and Caring Sciences, Faculty of Medicine, Linköping University , Linköping , Sweden
3. Department of Clinical Physiology, Linköping University , Linköping , Sweden
4. CMIV, Center for Medical Image Science and Viusalization, Linköping University , Linköping , Sweden
5. Department of Health, Medicine and Caring Sciences, Faculty of Medicine and Health Sciences, Linköping University , Linköping , Sweden