Adnan Riaz, Ahmad Ashar Ghuman, Sabeen Khalid. Assessment of Serum Levels of the Matrix-Metalloproteinase-9, Prostaglandin E-2 and Cyclo-Oxygenase-2 as a Candidate Biomarker of Chronic Obstructive Pulmonary Disease (COPD). Pakistan Journal of Medical & Health Sciences [Internet]. 2023 Jan. 8 [cited 2024 Sep. 19];16(11):439. Available from: https://mail.pjmhsonline.com/index.php/pjmhs/article/view/3431