@misc{8744,
  author = {D. Morales and B. Lipworth and P. Donnan and C. Jackson and B. Guthrie},
  title = {Respiratory effect of beta-blockers in people with asthma and cardiovascular disease: population-based nested case control study},
  year = {2017},
  journal = {BMC Med},
  volume = {15},
  number = {1},
  pages = {18},
  issn = {1741-7015},
  doi = {10.1186/s12916-017-0781-0},
}