Durrani, M., A. Shahid, U. K. Tahir, I.- ul- Haq, A. Yousaf, and S. Naveed. “Comparison of Chest X-Rays Findings in COVID-19 Suspected and Confirmed Cases at a University Teaching Hospital: A retrospective Comparative Study”. Pakistan Journal of Medical Sciences, Vol. 38, no. 1, Nov. 2021, doi:10.12669/pjms.38.1.4624.