Effect of Aspirin on the International Normalized Ratio in Elderly Patients with Atrial Fibrillation on Concurrent Warfarin Therapy. Sarawak J Pharm [Internet]. 2023 May 31 [cited 2026 Mar. 22];9(1):20-3. Available from: https://sjpharm.org/ojs/index.php/sjp/article/view/40