Minakshi Kumari, Sunil Kumar Verma, Vinod Kumar, and Shashi Bala Nag. “Association of Inflammatory Markers With the Severity of Covid -19”. International Journal of Health and Clinical Research, vol. 4, no. 16, Sept. 2021, pp. 92-101, https://ijhcr.com/index.php/ijhcr/article/view/2610.