1. Centre for Bone and Arthritis Research (L.V., M.L., D.S., M.E.N., D.M., C.O.), SE-413 45 Gothenburg, Sweden
2. Department of Geriatric Medicine (M.L., D.S., D.M.), Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, SE-413 45 Gothenburg, Sweden
3. Department of Clinical Chemistry (M.E.N.), Sahlgrenska University Hospital, SE-413 45 Gothenburg, Sweden
4. Clinical and Molecular Osteoporosis Research Unit (M.K.K.), Department of Clinical Sciences, Lund University, S-205 02 Malmö, Sweden
5. Department of Orthopaedics (M.K.K.), Malmö University Hospital, S-205 02 Malmö, Sweden