Abd Ala, I.A. et al. 2023. Detection of Chronic Obstructive Pulmonary Disease among Smokers Aged ≥40 years Attending Primary Health Care Centers in Baghdad-AL-Karkh and AL-Resafa. Journal of the Faculty of Medicine Baghdad. 64, 4 (Jan. 2023), 245–251. DOI:https://doi.org/10.32007/jfacmedbagdad.6441936.