Afridi, NK, et al. “Adherence of the NTP to DOTS Recommended Defaulters Tracing Mechanism in Khyber Pakhtunkhwa, Pakistan”. SAARC Journal of Tuberculosis, Lung Diseases and HIV AIDS, vol. 9, no. 1, Oct. 2012, pp. 1-7, doi:10.3126/saarctb.v9i1.6958.