Ansari, Brig Jawad Khaliq, et al. “FREQUENCY OF POSITIVE TUBERCULIN SKIN TEST IN BCG-VACCINATED ASYMPTOMATIC ADULTS IN PAKISTAN: Tuberculin Skin Test”. Pakistan Armed Forces Medical Journal, vol. 63, no. 2, June 2013, pp. 231-4, https://pafmj.org/PAFMJ/article/view/2255.