1. Norwegian National Advisory Unit on Ageing and HealthVestfold Hospital Trust, Tønsberg, Norway
2. Department for Mental Health Research and DevelopmentDivision for Mental health and addiction, Vestre Viken Hospital Trust, Lier, Norway
3. Faculty of MedicineUniversity of Oslo, Oslo, Norway
4. Research Centre of Old Age Psychiatry, Innlandet Hospital Trust, Ottestad, Norway
5. Department of Public Health and General PracticeFaculty of Medicine, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
6. St Olav's University Hospital, Trondheim, Norway