Mahendra, T., M. R., S. B. B., and S. N. Nijaguna. “Study of Hypokalemia and Correlation With Severity of Disease in Patients With COVID-19 Positive Severe Acute Respiratory Illness and COVID-19 Negative Severe Acute Respiratory Illness”. International Journal of Advances in Medicine, vol. 8, no. 8, July 2021, pp. 1102-7, doi:10.18203/2349-3933.ijam20212769.