1. Department of Medicine (DIMED), Geriatrics Division; University of Padova; Padova Italy
2. National Research Council, Neuroscience Institute; Aging Branch; Padova Italy
3. Physiotherapy Department; South London and Maudsley NHS Foundation Trust; London UK
4. Health Service and Population Research Department; Institute of Psychiatry, Psychology and Neuroscience King's College London; London UK
5. Faculty of Health, Social Care and Education; Anglia Ruskin University; Chelmsford UK
6. Department of Neurosciences; University of Padova; Padova Italy
7. National Health Care System; Padova Local Unit ULSS 17; Padova Italy
8. Oxford NIHR Musculoskeletal Biomedical Research Unit, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, Nuffield Orthopaedic Centre; University of Oxford; Oxford UK
9. MRC Lifecourse Epidemiology Unit, Southampton General Hospital; University of Southampton; Southampton UK
10. National Institute for Health Research Nutrition Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust; Southampton General Hospital; Southampton UK
11. Department of Public Health, Epidemiology and Health Economics; University of Liège; Liège Belgium
12. Division of Bone Diseases, Department of Internal Medicine Specialties; Geneva University Hospitals and Faculty of Medicine; Geneva Switzerland
13. Department of Medicine, Division of Bone and Mineral Diseases, Musculoskeletal Research Center; Washington University; St. Louis MO USA
14. Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences; University of Oxford; Oxford UK