@misc{9068,
  author = {E. Herrett and A. Gallagher and K. Bhaskaran and H. Forbes and R. Mathur and T. Van Staa and L. Smeeth},
  title = {Data Resource Profile: Clinical Practice Research Datalink (CPRD)},
  year = {2015},
  journal = {Int J Epidemiol},
  volume = {44},
  number = {3},
  pages = {827-36},
  issn = {0300-5771},
  doi = {10.1093/ije/dyv098},
}