1. Hospital del Mar-IMIM-Autonomous University of Barcelona; Barcelona Spain
2. Red Tematica Investigacion en Envejecimiento y Fragilidad (RETICEF); Instituto Carlos III; Barcelona Spain
3. St. Joseph's Hospital; McMaster University; Hamilton Ontario Canada
4. Department of Rheumatology; University of Verona; Ospedale Verona, Valeggio Italy
5. Center for Outcomes Research; University of Massachusetts Medical School; Worcester MA USA
6. Leuven University Center for Metabolic Bone Diseases; Division of Geriatric Medicine; Katholieke Universiteit Leuven; Leuven Belgium
7. Institut National de la Santé et de la Recherche Médicale (INSERM; National Institute of Health and Medical Research) U831; Université de Lyon, Division of Rheumatology, Hôpital E. Herriot; Lyon France
8. School of Clinical Medicine; Addenbrooke's Hospital; University of Cambridge; Cambridge UK
9. Medical Research Council (MRC) Lifecourse Epidemiology Unit; University of Southampton, Southampton General Hospital; Southampton UK
10. University of Pittsburgh; Pittsburgh; Pennsylvania USA
11. Fred Hutchinson Cancer Research Center; Seattle WA USA
12. Helen Hayes Hospital and Columbia University; West Haverstraw; New York USA
13. Department of Endocrinology; Vrije Universiteit (VU) University Medical Center; Amsterdam The Netherlands
14. Alfried Krupp Krankenhaus; Department of Internal Medicine III; Essen Germany
15. Department of Rheumatology; University of Verona; Verona Italy
16. Paris Descartes University; Cochin Hospital; Paris France
17. University of Alabama-Birmingham; Birmingham AL USA
18. Department of Rheumatology; Cedars-Sinai/University of California; Los Angeles (UCLA) Los Angeles, CA USA
19. Department of Medicine; Columbia University Medical Center; New York NY USA
20. Bone Health and Osteoporosis Center; University of Cincinnati; Cincinnati OH USA