Mthembu, J., Mabaso, M., Khan, G., & Simbayi, L. (2017). Prevalence of psychological distress and its association with socio-demographic and HIV-risk factors in South Africa: Findings of the 2012 HIV prevalence, incidence and behaviour survey. SSM - Population Health, 3, 658-662. https://doi.org/10.1016/j.ssmph.2017.07.009