@misc{9353,
  author = {J. Quint and H. Mullerova and R. DiSantostefano and H. Forbes and S. Eaton and J. Hurst and K. Davis and L. Smeeth},
  title = {Validation of chronic obstructive pulmonary disease recording in the Clinical Practice Research Datalink (CPRD-GOLD)},
  year = {2014},
  journal = {BMJ Open},
  volume = {4},
  number = {7},
  pages = {e005540},
  issn = {2044-6055 (Print) 2044-6055},
  doi = {10.1136/bmjopen-2014-005540},
}