Brouki Y, El Machrouh Y, Khali C, Barkaoui M, Eloirdi A, Zahi B, et al. Sex differences and physical activity associations with electrocardiographic patterns in amateur athletes: a cross-sectional study. Retos [Internet]. 2025 Aug. 22 [cited 2026 Nov. 15];71:555-6. Available from: https://www.revistaretos.org/index.php/retos/article/view/117255