@misc{8790,
  author = {F. Nissen and D. Morales and H. Mullerova and L. Smeeth and I. Douglas and J. Quint},
  title = {Validation of asthma recording in the Clinical Practice Research Datalink (CPRD)},
  year = {2017},
  journal = {BMJ Open},
  volume = {7},
  number = {8},
  pages = {e017474},
  issn = {2044-6055},
  doi = {10.1136/bmjopen-2017-017474},
}