Kunene, S, et al. “Anterior Knee Pain and Its Extrinsic Risk Factors Among Runners in under-Resourced Communities in Ekurhuleni, Gauteng, South Africa”. South African Journal of Sports Medicine, vol. 31, no. 1, Apr. 2019, pp. 1-6, doi:10.17159/2078-516X/2019/v31i1a6090.