@misc{8065,
  author = {D. Metcalfe and J. Masters and A. Delmestri and A. Judge and D. Perry and C. Zogg and B. Gabbe and M. Costa},
  title = {Coding algorithms for defining Charlson and Elixhauser co-morbidities in Read-coded databases},
  year = {2019},
  journal = {BMC Med Res Methodol},
  volume = {19},
  number = {1},
  pages = {115},
  issn = {1471-2288},
  doi = {10.1186/s12874-019-0753-5},
}