Lubis, Ainil, Andika Sitepu, Tengku Intan, and Ika Tanjung. “Comparison of The HARKIT Score With The STS Score in Predicting Mortality Rates Post Valve Surgery”. Indonesian Journal of Cardiology 45, no. 1 (January 2, 2025): 1-8. Accessed May 1, 2026. https://www.ijconline.id/index.php/ijc/article/view/1615.