1. Løvåsen Teaching Nursing Home, Municipality of Bergen, N-5145 Fyllingsdalen, Norway
2. Department of Public Health and General Practice, Norwegian University of Science and Technology, N-7491 Trondheim, Norway
3. Centre for Clinical Research, Haukeland University Hospital, N-5021 Bergen, Norway
4. Research Group on Lifestyle Epidemiology, Department of Public Health and Primary Health Care, University of Bergen, N-5021 Bergen, Norway
5. Department of Radiology, Haraldsplass Hospital, N-5021 Bergen, Norway