1. Department of Research and Evaluation; Kaiser Permanente Southern California; Pasadena CA USA
2. O.N. Diagnostics; Berkeley CA USA
3. Departments of Epidemiology and Biostatistics; University of California; San Francisco CA USA
4. Orthopedic Biomechanics Laboratory; Beth Israel Deaconess Medical Center and Harvard Medical School; Boston MA USA
5. Department of Endocrinology; Kaiser Permanente Southern California; Panorama City CA USA
6. Kogod Center on Aging and Division of Endocrinology; Mayo Clinic; Rochester MN USA
7. Bone and Mineral Unit; Oregon Health and Science University; Portland OR USA
8. Toni Stabile Osteoporosis Center; Department of Medicine; Columbia University Medical Center; New York NY USA
9. Departments of Mechanical Engineering and Bioengineering; University of California; Berkeley CA USA