@misc{9352,
  author = {R. Cornish and J. Henderson and A. Boyd and R. Granell and T. Van Staa and J. Macleod},
  title = {Validating childhood asthma in an epidemiological study using linked electronic patient records},
  year = {2014},
  journal = {BMJ Open},
  volume = {4},
  number = {4},
  pages = {e005345},
  issn = {2044-6055 (Print) 2044-6055},
  doi = {10.1136/bmjopen-2014-005345},
}