@misc{8848,
  author = {A. Morgan and E. Herrett and B. De Stavola and L. Smeeth and J. Quint},
  title = {COPD disease severity and the risk of venous thromboembolic events: a matched case-control study},
  year = {2016},
  journal = {Int J Chron Obstruct Pulmon Dis},
  volume = {11},
  pages = {899-908},
  issn = {1176-9106},
  doi = {10.2147/copd.s100533},
}