@article{williamson2014-25024246,
  author  = {Williamson, T. and Green, M. E. and Birtwhistle, R. and Khan, S. and Garies, S. and Wong, S. T. and Natarajan, N. and Manca, D. and others},
  title   = {{Validating the 8 CPCSSN case definitions for chronic disease surveillance in a primary care database of electronic health records}},
  journal = {Annals of family medicine},
  year    = {2014},
  doi     = {10.1370/afm.1644},
  pmid    = {25024246},
  url     = {https://doi.org/10.1370/afm.1644}
}