@misc{indiciaeb8549bdcd211,
  title = {Ankylosing spondylitis.},
  author = {G Crawford},
  year = {1977},
  doi = {10.1001/jama.1977.03280210034006},
  url = {https://pubmed.ncbi.nlm.nih.gov/578820/},
  note = {Source identifier: 578820}
}