1. Amgen Inc., Thousand Oaks, CA, USA
2. UCSF, San Francisco, CA, USA
3. University of Verona, Verona, Italy
4. Leuven University, Division of Geriatric Medicine, Leuven, Belgium
5. Azienda Sanitaria Genovese, Genoa, Italy
6. Bethesda Health Research Center, Bethesda, MD, USA
7. Center for Clinical and Basic Research, Ballerup, Denmark
8. University of Sheffield, Sheffield, United Kingdom
9. Hospital Universitario 12 de Octubre, Madrid, Spain
10. University of British Columbia, Vancouver, BC, Canada
11. Sección Osteopatías Médicas, Hospital de Clínicas, Universidad de Buenos Aires, Buenos Aires, Argentina
12. Oregon Osteoporosis Center, Portland, OR, USA
13. University of Auckland, Auckland, New Zealand
14. Columbia University Medical Center, New York, NY, USA
15. Instituto de Investigaciones Metabolicas and University of Salvador, Buenos Aires, Argentina
16. Centro Paulista de Investigação Clinica, São Paulo, Brazil
17. San Francisco Coordinating Center, CPMC Research Institute, and UCSF, San Francisco, CA, USA