P. Patil, A. Tyagi, M. Waghmare, A. Srivastava, and M. Waran, “A comparative study of PSI and Curb-65 scoring systems in predicting ICU admissions and mortality in cases of community-acquired pneumonia”, Int J Med Res Rev, vol. 8, no. 3, pp. 240- 246, Jun. 2020.