1. Departments of Medicine and Epidemiology & Biostatistics; University of California, San Francisco; San Francisco CA USA
2. Center for Advanced Orthopedic Studies; Beth Israel Deaconess Medical Center and Harvard Medical School; Boston MA USA
3. California Pacific Medical Center; San Francisco CA USA
4. Department of Epidemiology; Graduate School of Public Health; University of Pittsburgh; Pittsburgh PA USA
5. Merck & Co., Inc.; Kenilworth NJ USA
6. Amgen Inc.; Thousand Oaks CA USA
7. Mayo Clinic Center for Clinical and Translational Science; Rochester MN USA
8. Academic Unit of Bone Metabolism; University of Sheffield; Sheffield UK