Nazir, M. A., A. Naeem, K. Ahmad, M. Asrar, G. Zulfiqar, and N. Sheheryar. “Prevalence of Vitamin D Deficiency in Patients With Active Tuberculosis at a Tertiary Care Hospital: A Cross-Sectional Study”. Annals of Punjab Medical College (APMC), Vol. 16, no. 3, Sept. 2022, pp. 220-3, doi:10.29054/apmc/2022.1144.