Kent, L., Smyth, L., Clayton, C., Scott, L., Cook, T., Stephens, R., …Singh, D. (2008). Cigarette smoke extract induced cytokine and chemokine gene expression changes in COPD macrophages. Cytokine, 42(2), 205-216. https://doi.org/10.1016/j.cyto.2008.02.001