Slehria, Atiq-Ur-Rehman, et al. “SPECTRUM OF CHEST X-RAY FINDINGS IN COVID-19 POSITIVE PATIENTS UTILIZING MODIFIED RALE SCORE FOR SEVERITY ASSESSMENT”. Pakistan Armed Forces Medical Journal, vol. 70, no. 2, Sept. 2020, pp. S494-500, https://www.pafmj.org/PAFMJ/article/view/5238.