Spears, M., McSharry, C., Chaudhuri, R., Weir, C. J., de Wet, C., & Thomson, N. C. (2013). Smoking in Asthma Is Associated with Elevated Levels of Corticosteroid Resistant Sputum Cytokines—An Exploratory Study. Public Library of Science.

Spears, Mark, Charles McSharry, Rekha Chaudhuri, Christopher J. Weir, Carl de Wet, và Neil C. Thomson. Smoking in Asthma Is Associated With Elevated Levels of Corticosteroid Resistant Sputum Cytokines—An Exploratory Study. Public Library of Science, 2013.

Spears, Mark, et al. Smoking in Asthma Is Associated With Elevated Levels of Corticosteroid Resistant Sputum Cytokines—An Exploratory Study. Public Library of Science, 2013.