Wang, Beilei, Xingyue Su, and Xiang Ma. “Association Between Serum Copper and Childhood Asthma: A Systematic Review and Meta-Analysis”. Allergologia et Immunopathologia 53, no. 5 (September 1, 2025): 154–163. Accessed April 21, 2026. https://www.all-imm.com/index.php/aei/article/view/1394.