1. Division of Endocrinology and Diabetes University Campus Bio‐Medico di Roma Rome Italy
2. Department of Internal Medicine, Division of Bone and Mineral Diseases, Musculoskeletal Research Center Washington University School of Medicine St. Louis MO USA
3. Department of Human Sciences and Promotion of the Quality of Life San Raffaele Open University Rome Italy
4. Metabolic Bone Centre Northern General Hospital Sheffield UK
5. Department Epidemiology and Biostatistics University of California, San Francisco San Francisco CA USA
6. Departments of Medicine and Epidemiology and Biostatistics University of California, San Francisco San Francisco CA USA
7. Center for Aging and Population Health, Department of Epidemiology, Graduate School of Public Health University of Pittsburgh Pittsburgh PA USA
8. Institute for Aging Research Hebrew SeniorLife Boston MA USA
9. Department of Medicine Harvard Medical School Boston MA USA
10. Division of Gerontology Beth Israel Deaconess Medical Center Boston MA USA