Waheed, Hira, and Syed Jahanzeb. “Positive HRCT Chest Findings in Patients With COVID-19 Pneumonia and Negative Real-Time Polymerase Chain Reaction Test- A Clinical Audit”. Pakistan Journal of Chest Medicine 27, no. 4 (December 2, 2021): 278–282. Accessed June 26, 2026. https://www.pjcm.net/index.php/pjcm/article/view/728.