Ridwan, A.A. and Sarastri, Y. 2026. Predictors of 90-day Readmission After Hospitalization in Heart Failure with Reduced Ejection Fraction Patients: A Single-Centre Analytical Cohort Retrospective Study. Indonesian Journal of Cardiology. (Oct. 2026). DOI:https://doi.org/10.30701/ijc.2072.