Nugraha Putra, O., Anabella, R. Q., In’ami, I. N., Nur Hasibullah Ma, A. Y. and Purwanto, R. W. (2026) “The Effect of Smoking on Matrix Metalloproteinase-9 (MMP-9) Expression and Its Relationship with Chronic Obstructive Pulmonary Disease: Systematic Review”, Cermin Dunia Kedokteran, 53(01), pp. 12–18. doi: 10.55175/cdk.v53i01.1788.