1. Laboratory of Human Motion Analysis, Liège, Belgium
2. Department of Motricity Sciences, University of Liège, Liege, Belgium
3. University and Hospital Biostatistics Center (B-STAT), University of Liège, Belgium
4. WHO Collaborating Centre for Public Health Aspects of Musculoskeletal Health and Aging, Division of Public Health, Epidemiology and Health Economics, University of Liège, Liège, Belgium