1. Department of Public Health and Nursing, Faculty of Medicine and Health Sciences Norwegian University of Science and Technology (NTNU) Trondheim Norway
2. Centre for Old Age Psychiatric Research Innlandet Hospital Trust Ottestad Norway
3. General Practice Research Unit, Department of Public Health and Nursing, Faculty of Medicine and Health Sciences Norwegian University of Science and Technology (NTNU) Trondheim Norway
4. St Olavs University Hospital Trondheim Norway
5. Norwegian National Advisory Unit on Ageing and Health Vestfold Health Trust Tønsberg Norway