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. International Journal of Health and Clinical Research, [S. l.], v. 4, n. 17, p. 342–345, 2021. Disponível em: https://ijhcr.com/index.php/ijhcr/article/view/2839. Acesso em: 14 mar. 2025.