1. Department of Molecular and Clinical Medicine Sahlgrenska Academy Gothenburg University Gothenburg Sweden
2. Department of Cardiothoracic Surgery Sahlgrenska University Hospital Gothenburg Sweden
3. Department of Medicine Skaraborg Hospital Lidköping Lidköping Sweden
4. Statistiska Konsultgruppen Gothenburg Sweden
5. Department of Ophthalmology, Institute of Neuroscience and Physiology Sahlgrenska Academy, University of Gothenburg Gothenburg Sweden
6. Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology Sahlgrenska Academy, Centre for Ageing and Health–AgeCap, University of Gothenburg Mölndal Sweden