@misc{8644,
  author = {B. Nwaru and C. Simpson and A. Sheikh and D. Kotz},
  title = {External validation of a COPD prediction model using population-based primary care data: a nested case-control study},
  year = {2017},
  journal = {Sci Rep},
  volume = {7},
  pages = {44702},
  issn = {2045-2322},
  doi = {10.1038/srep44702},
}