1. Center for Bone Research at the Sahlgrenska Academy (A.L.E., M.L., L.V., D.M., C.O.), Departments of Internal Medicine and Geriatrics, Gothenburg University, SE-413 45 Gothenburg, Sweden
2. Laboratory of Molecular Endocrinology and Oncology (F.L.), Laval University Hospital Research Center and Laval University, Québec City, Quebec G1V 4G2, Canada
3. Department of Medical Sciences (M.L., A.-C.S., O.L.), Uppsala University, SE-751 05 Uppsala, Sweden
4. Bone and Mineral Unit (E.S.O.), Department of Medicine, Oregon Health and Science University, Portland, Oregon 97239
5. San Francisco Coordinating Center (S.R.C.), Research Institute, California Pacific Medical Center, San Francisco, California 94107-1762
6. Department of Epidemiology (J.M.Z.), Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
7. Clinical and Molecular Osteoporosis Research Unit (M.K.K.), Department of Clinical Sciences, Lund University, and Department of Orthopaedics, Malmö University Hospital, SE-205 02 Malmö, Sweden