Özkan, Abuzer, Mehmet Muzaffer İslam, Hatice Şeyma Akça, Serkan Emre Eroğlu, and Gökhan Aksel. “Effect of the Prognostic Nutritional Index and Systemic Immuneinflammatory Index in Predicting Short-Term Mortality in Geriatric Patients With SARS-CoV-2 Infection”. European Journal of Clinical and Experimental Medicine 20, no. 4 (December 30, 2022): 399–403. Accessed December 28, 2025. https://journals.ur.edu.pl/ejcem/article/view/11976.