1. Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
2. Statistiska Konsultgruppen Gothenburg Sweden
3. Department of Clinical Neuroscience, Institute of Neuroscience and Physiology, Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
4. Department of Cardiology and Department of Health, Medicine and Caring Sciences Linkoping University Linkoping Sweden