Kuliesh, I. O., Riabokon, O. V., & Kalashnyk, K. V. (2025). Predictive value of the Elixhauser comorbidity index in assessing the risk of coronavirus disease (COVID-19) mortality in patients with pneumonia. Zaporozhye Medical Journal, 27(1), 25–30. https://doi.org/10.14739/2310-1210.2025.1.317977