Sugiarto A, Pryambodho, Imelda M, Aditianingsih D. Charlson comorbidity index to predict 28-day mortality in critically ill COVID-19 patients. Med J Indones [Internet]. 2023 Jun. 26 [cited 2025 Apr. 3];32(1):19-24. Available from: https://mji.ui.ac.id/journal/index.php/mji/article/view/6070