1 Department of Public Health, Epidemiology and Health Economics, University of Liège, Liège, Belgium; WHO Collaborating Centre for Public Health Aspects of Musculo-Skeletal Health and Aging.
2 Servicio de Geriatría, Hospital Universitario Ramón y Cajal (IRYCIS), Madrid, Spain.
3 Center for Geriatric Medicine, University of Heidelberg, Heidelberg, Germany.
4 MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, England, United Kingdom; NIHR Musculoskeletal Biomedical Research Unit, University of Oxford, Oxford, United Kingdom.
5 Gérontopôle of Toulouse, University of Toulouse III, INSERM 1027, CHU Purpan, Toulouse, France.
6 Department of Geriatrics, Neurosciences and Orthopedics, Catholic University of the Sacred Heart Rome, Milano, Italy.
7 Department of Public Health, Epidemiology and Health Economics, University of Liège, Liège, Belgium; WHO Collaborating Centre for Public Health Aspects of Musculo-Skeletal Health and Aging; Chair for Biomarkers of Chronic Diseases, Biochemistry Department, College of Science, King Saud University, Riyadh, Kingdom of Saudi Arabia.
8 National Research Council, Neuroscience Institute, Aging Branch, Padua, Italy.
9 Service of Bone Diseases, Geneva University Hospitals and Faculty of Medicine, Geneva, Switzerland.
10 Department of Health Services Research, CAPHRI Care and Public Health Research Institute, Maastricht University, the Netherlands.