Tapnikar, L. A., S. Patil, and J. Nyse. “Interpreting Kaplan Meier’s Survival Curve in COVID-19 Patients: A Systematic Review”. International Journal Of Community Medicine And Public Health, vol. 8, no. 1, Dec. 2020, pp. 424-33, doi:10.18203/2394-6040.ijcmph20205733.