1. Cambridge Biomedical Campus; Cambridge; UK
2. Center for Outcomes Research; University of Massachusetts Medical School; Worcester MA USA
3. St Joseph's Healthcare; McMaster University; Hamilton Canada
4. Division of Rheumatology, INSERM U1033; Université de Lyon; Hôpital E Herriot Lyon France
5. MRC Lifecourse Epidemiology Unit; University of Southampton; Southampton UK
6. Hospital del Mar-IMIM-Autonomous University of Barcelona; Barcelona; Spain
7. RETICEF; Instituto Carlos III; Madrid Spain
8. University of Pittsburgh; Pittsburgh PA USA
9. University of Massachusetts Medical School; Worcester MA USA
10. Fred Hutchinson Cancer Research Center; Seattle WA USA
11. University of Sydney Institute of Bone and Joint Research and Department of Rheumatology; Royal North Shore Hospital; Sydney Australia
12. Department of Endocrinology; VU University Medical Center; Amsterdam Netherlands
13. Helen Hayes Hospital and Columbia University; West Haverstraw; NY USA
14. Department of Internal Medicine III; Alfried Krupp Krankenhaus; Essen Germany
15. Rheumatology Section; Department of Medicine; University of Verona; Verona Italy
16. Paris Descartes University; Cochin Hospital; Paris France
17. Division of Clinical Immunology and Rheumatology; University of Alabama at Birmingham; Birmingham AL USA
18. Columbia University Medical Center; New York; NY USA
19. Department of Rheumatology; Cedars-Sinai Medical Center; Los Angeles CA USA
20. Mercy Health Osteoporosis and Bone Health Services; Cincinnati; OH USA