Lindra, Derallah A, Endang Purwaningsih, Ahmad Rusdan H Utomo, Faisal Yunus, and Makrup E Harahap. “The Impact of Klotho Gene Polymorphisms on Chronic Obstructive Pulmonary Disease (COPD): A Systematic Review”. Respiratory Science 5, no. 2 (February 28, 2025): 99-114. Accessed April 19, 2026. https://respiratoryscience.or.id/index.php/journal/article/view/165.