1. Department of Physiotherapy, College of Medical Sciences, University of Benin, Nigeria
2. Centre for Living, School of Health and Life Sciences, Glasgow Caledonian University, Glasgow, UK
3. School of Medicine, Boston University School of Medicine, Boston, MA, USA
4. Department of Physical Therapy and Rehabilitation Science, University of Iowa, Iowa City, IA, USA
5. Department of Clinical Sciences Lund, Orthopaedics, Clinical Epidemiology Unit, Faculty of Medicine, Lund University, Lund, Sweden
6. Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, CA, USA
7. Department of Epidemiology, School of Public Health, University of Alabama, Birmingham, AL, USA
8. Department of Movement and Sports Science, Ghent University, Ghent, Belgium