T., K. S., A. G. Nair, S. K. H. R., and S. N. “Study to Determine the Correlation of Platelet-Lymphocyte Ratio in COVID 19 Positive and Negative Severe Acute Respiratory Infections Cases”. International Journal of Advances in Medicine, vol. 8, no. 8, July 2021, pp. 1097-01, doi:10.18203/2349-3933.ijam20212770.