Numprasit, W., C. Saengsri, and P. Pisarnturakit. “Effect of Age on Recurrence in Hormone Receptor-Positive Breast Cancer, and Factors Significantly Associated With Cancer Recurrence”. Siriraj Medical Journal, vol. 71, no. 6, Nov. 2019, pp. 438-45, https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/225409.