A. Shaban and L. Demirevska, “Frailty and anticoagulation in patients with atrial fibrillation”, MR, vol. 62, no. 5, pp. 20–26, Sep. 2026, Accessed: Sep. 14, 2026. [Online]. Available: https://journals.mu-sofia.bg/index.php/mr/article/view/1131