1. HUNT Research Centre, Department of Public Health and Nursing, NTNU, Norwegian University of Science and Technology, 7600 Levanger, Norway
2. Leiden University Medical Center, Department of Internal Medicine, Section of Gerontology and Geriatrics, 2333 ZA Leiden, The Netherlands
3. K.G. Jebsen Center for Genetic Epidemiology, Department of Public Health and Nursing, NTNU, Norwegian University of Science and Technology, 7491 Trondheim, Norway
4. Department of Endocrinology, Clinic of Medicine, St. Olavs Hospital, Trondheim University Hospital, 7030 Trondheim, Norway
5. Center for Oral Health Services and Research Mid-Norway (TkMidt), 7030 Trondheim, Norway
6. Norwegian National Centre for Aging and Health, Vestfold Hospital Trust, 3103 Tønsberg, Norway
7. Department of Geriatric Medicine, Oslo University Hospital, 0424 Oslo, Norway
8. Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, 0318 Oslo, Norway
9. General Practice Research Unit, Department of Public Health and Nursing, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway
10. Levanger Hospital, Nord-Trøndelag Hospital Trust, 7600 Levanger, Norway