@misc{9088,
  author = {C. Stolwijk and I. Essers and A. van Tubergen and A. Boonen and M. Bazelier and M. De Bruin and F. de Vries},
  title = {The epidemiology of extra-articular manifestations in ankylosing spondylitis: a population-based matched cohort study},
  year = {2015},
  journal = {Ann Rheum Dis},
  volume = {74},
  number = {7},
  pages = {1373-8},
  issn = {0003-4967},
  doi = {10.1136/annrheumdis-2014-205253},
}