Ahad, F. ., Ali, R. ., Kashif, M. ., Khan, S. and Adnan, M. . (2024) “Serum Total Bilirubin as a Potential Biomarker in Chronic Obstructive Pulmonary Disease: A Correlation Study”, Pakistan Journal of Chest Medicine, 30(4), pp. 417–422. Available at: https://www.pjcm.net/index.php/pjcm/article/view/980 (Accessed: 17April2026).