Zafar, Saerah Iffat, et al. “Impact of Thymic Response in COVID-19 Pneumonia on Disease Severity and Mortality-As Assessed on CT-Chest”. Pakistan Armed Forces Medical Journal, vol. 73, no. 2, May 2023, pp. 527-30, https://doi.org/10.51253/pafmj.v73i2.8125.