1. Department of Health Science, The University of Alabama, Tuscaloosa, AL, USA
2. Department of Epidemiology, Harvard University TH Chan School of Public Health, Boston, USA
3. Department of Physiotherapy, University Teaching Hospital, University of Zambia (UTH), Lusaka, Zambia
4. Department of Biostatistics, Epidemiology & Informatics, University of Pennsylvania, Philadelphia, PA, USA
5. Football Association of Zambia, Lusaka, Zambia