Osteoporosis and Bone Biology, Garvan Institute of Medical Research, Sydney, Australia. Department of Family Medicine, Research School Care and Public Health Research Institute (CAPHRI), Maastricht University, Maastricht, The Netherlands. Department of Medicine, McMaster University, Hamilton, Ontario, Canada. Canadian Multicentre Osteoporosis Study (CaMos) National Coordinating Centre, McGill University, Montreal, Quebec, Canada. Department of Internal Medicine, Subdivision of Rheumatology, Research School Nutrim, Maastricht University Medical Center, Maastricht, The Netherlands. Department of Internal Medicine, VieCuri Medical Centre of Noord-Limburg, Venlo, The Netherlands. Clinical School, St Vincent's Hospital, Sydney, Australia. Faculty of Medicine, University of New South Wales, Sydney, Australia. Clinical Translation and Advanced Education, Garvan Institute of Medical Research, Sydney, Australia. School of Medicine Sydney, University of Notre Dame Australia, Sydney, Australia. Department of Internal Medicine, Subdivision of Rheumatology, Research School Care and Public Health Research Institute (CAPHRI), Maastricht University Medical Center, Maastricht, The Netherlands. Biomedical Research Institute, University Hasselt, Hasselt, Belgium. Department of Medicine, McGill University, Montreal, Quebec, Canada. Department of Medicine, University of Calgary, Calgary, Alberta, Canada. Department of Medicine, University of Toronto, Toronto, Ontario, Canada. Department of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada. Faculty of Medicine, Memorial University, St. John's, Newfoundland, Canada. School of Public Health, University of Minnesota, Minneapolis, MN, USA. Department of Medicine and Endocrinology, University of British Columbia, Vancouver, British Columbia, Canada.