Samreen Mushtaq, Abdul Sattar, Sadia Anjum. “Correlation Between Oxygen Saturation of Patient and Severity Index of Covid 19 Pneumonia on CT”. Pakistan Journal of Medical & Health Sciences 16, no. 07 (July 30, 2022): 93. Accessed June 4, 2026. https://pjmhsonline.com/pjmhs/article/view/1783.