Ashish Jain, Srishti Jain, Rajeev Kasliwal, Ravi Jain, Nimish Mathur, Rohit Jain, Munesh Meena, Prachi Verma, Divyansh Gupta. Charlson Comorbidity Index Score and its impact on severe outcome and death in COVID-19 cases: A retrospective analysis. Int. J. Heal. Clin. Res. [Internet]. 2021Sep.30 [cited 2025Mar.14];4(17):342-5. Available from: https://ijhcr.com/index.php/ijhcr/article/view/2839