@article {Spears, author = {M. Spears and I. Donnelly and L. Jolly and M. Brannigan and K. Ito and C. McSharry and J. Lafferty and R. Chaudhuri and G. Braganza and I.M. Adcock and P.J. Barnes and S. Wood and N.C. Thomson}, title = {Effect of theophylline plus beclometasone on lung function in smokers with asthma-a pilot study}, year = {2009}, doi = {10.1183/09031936.00158208}, publisher = {European Respiratory Society}, issn = {0903-1936}, URL = {https://erj.ersjournals.com/content/early/2009/02/05/09031936.00158208}, eprint = {https://erj.ersjournals.com/content/early/2009/02/05/09031936.00158208.full.pdf}, journal = {European Respiratory Journal} }