1. Centre for Age-Related Medicine, Stavanger University Hospital, Stavanger, Norway
2. Department of Clinical Sciences, University of Bergen, Bergen, Norway
3. Department of Research, Section of Biostatistics, Stavanger University Hospital, Stavanger, Norway
4. Department of Cardiology, Stavanger University Hospital, Stavanger, Norway
5. Institute of Psychiatry, Psychology & Neuroscience, King’s College, London, UK