“Effect of Aspirin on the International Normalized Ratio in Elderly Patients with Atrial Fibrillation on Concurrent Warfarin Therapy” (2023) Sarawak Journal of Pharmacy, 9(1), pp. 20–30. Available at: https://sjpharm.org/ojs/index.php/sjp/article/view/40 (Accessed: 22 March 2026).