@misc{indiciaeef568af0e07c,
  title = {Ankylosing spondylitis.},
  author = {K M Ledo},
  doi = {10.1097/00006416-198311000-00009},
  url = {https://pubmed.ncbi.nlm.nih.gov/6562450/},
  note = {Source identifier: 6562450}
}