Mehak Hanif, Kamran Khan Sumalani, Vishal Mandhan, Zarkesh Shaikh, and Shahbaz Haider. “Abnormal Renal Function Tests at Presentation in Severe COVID-19 Pneumonia and Its Effect on Clinical Outcomes”. Pakistan Journal of Medical Research, vol. 62, no. 2, July 2023, pp. 59-64, https://www.pjmr.org.pk/index.php/pjmr/article/view/484.