S. K. Khaidirman, Z. Mukhtar, Y. Sarastri, A. P. Ketaren, A. H. Raynaldo, and C. A. Andra, “The Relationship between Pre Discharge Left Ventricle Diastolic Dysfunction and 30 days And 6 Months Rehospitalization in Patients with Heart Failure with Reduced Ejection Fraction (HFrEF) at Haji Adam Malik General Hospital Medan”, JSocMed, vol. 2, no. 5, pp. 148–154, May 2023.