Kigozi, N. G., Chikobvu, P., Heunis, J. C., & van der Merwe, S. (2014). A retrospective analysis of two-month sputum smear non-conversion in new sputum smear positive tuberculosis patients in the Free State Province, South Africa. Journal of Public Health in Africa, 5(2). https://doi.org/10.4081/jphia.2014.324