1. Medical Research Council (MRC) Lifecourse Epidemiology Unit; University of Southampton; Southampton UK
2. National Institute for Health Research (NIHR) Southampton Biomedical Research Centre, University of Southampton; and University Hospital Southampton NHS Foundation Trust; Southampton UK
3. Centre for Bone and Arthritis Research (CBAR); Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
4. Centre for Metabolic Bone Diseases; University of Sheffield; Sheffield UK
5. Oregon Health & Science University; Portland OR USA
6. Department of Public Health and Preventive Medicine; Division of Biostatistics; Oregon Health and Science University; Portland OR USA
7. Department of Medicine & Therapeutics and School of Public Health; The Chinese University of Hong Kong; Hong Kong The People's Republic of China
8. Clinical and Molecular Osteoporosis Research Unit; Lund University, Lund, Sweden; and Department of Orthopedics; Skane University Hospital; Malmö Sweden
9. Department of Surgical Sciences; University of Uppsala; Uppsala Sweden
10. National Institute for Health Research (NIHR) Biomedical Research Centre; University of Oxford; Oxford UK
11. Research Institute; California Pacific Medical Center; San Francisco CA USA
12. Department of Epidemiology and Biostatistics; University of California-San Francisco; San Francisco CA USA
13. Institute for Health and Aging; Catholic University of Australia; Melbourne Australia
14. Centre for Integrated Research in Musculoskeletal Ageing (CIMA); Mellanby Centre for Bone Research; University of Sheffield; Sheffield UK