1. Department of Old Age Psychiatry Oslo University Hospital Oslo Norway
2. Institute of Clinical Medicine Faculty of Medicine University of Oslo Oslo Norway
3. Department of Psychiatric Research Diakonhjemmet Hospital Oslo Norway
4. Norwegian Centre for Mental Disorders Research (NORMENT) Institute of Clinical Medicine University of Oslo Oslo Norway
5. Department of Clinical Neuroscience Centre for Psychiatric Research, Karolinska Institutet Stockholm Sweden
6. Department of Biological and Medical Psychology University of Bergen Bergen Norway
7. Division of Psychiatry Haukeland University Hospital Bergen Norway
8. Department of Radiology Haukeland University Hospital Bergen Norway
9. Department of Psychology Faculty of Social Sciences University of Oslo Oslo Norway