@misc{7953,
  author = {K. Wing and E. Williamson and J. Carpenter and L. Wise and S. Schneeweiss and L. Smeeth and J. Quint and I. Douglas},
  title = {Real world effects of COPD medications: a cohort study with validation against RCT results},
  year = {2020},
  journal = {Eur Respir J},
  issn = {0903-1936},
  doi = {10.1183/13993003.01586-2020},
}