Jaury, D.F. et al. 2026. The correlation between ejection fraction values and blood urea nitrogen levels and blood urea nitrogen/creatinine ratios in heart failure. Acta Biomedica Atenei Parmensis. 97, 1 (Feb. 2026), 18138 . DOI:https://doi.org/10.23750/abm.2026.18138.