@article{20594,
  author = {Jenkins C. and Celli B. and Anderson J. and Ferguson G. and Jones P. and Vestbo J. and Yates J. and Calverley P.},
  title = {Seasonality and determinants of moderate and severe COPD exacerbations in the TORCH study},
  year = {2012},
  journal = {European Respiratory Journal},
  volume = {39},
  edition = {7 July 2011},
  number = {1},
  pages = {38-45},
  language = {eng},
}