@misc{9686,
  author = {N. Khan and R. Perera and S. Harper and P. Rose},
  title = {Adaptation and validation of the Charlson Index for Read/OXMIS coded databases},
  year = {2010},
  journal = {BMC Fam Pract},
  volume = {11},
  pages = {1},
  issn = {1471-2296},
  doi = {10.1186/1471-2296-11-1},
}