1. The Medical Research Laboratories, Clinical Institute, Aarhus University Hospital (J.F., A.F.), DK-8000 Aarhus, Denmark
2. Department of Medical Sciences (C.B.), Uppsala University, 75125 Uppsala, Sweden
3. Uppsala Clinical Research Centre (K.J., L.B.), 75125 Uppsala, Sweden
4. Department of Public Health and Caring Sciences/Geriatrics (B.Z.), Uppsala University, 75125 Uppsala, Sweden