Parasher, A., V. Saini, A. Saini, R. R. Barik, A. Aggarwal, and J. Khan. “A Study of the Association of Leukopenia With Disease Severity and Mortality in Patients Diagnosed With COVID-19”. International Journal of Advances in Medicine, vol. 7, no. 11, Oct. 2020, pp. 1721-5, doi:10.18203/2349-3933.ijam20204526.