@misc{9479,
  author = {S. Norton and G. Koduri and E. Nikiphorou and J. Dixey and P. Williams and A. Young},
  title = {A study of baseline prevalence and cumulative incidence of comorbidity and extra-articular manifestations in RA and their impact on outcome},
  year = {2013},
  journal = {Rheumatology (Oxford)},
  volume = {52},
  number = {1},
  pages = {99-110},
  issn = {1462-0324},
  doi = {10.1093/rheumatology/kes262},
}