@misc{indiciae3f7185535d36,
  title = {Ankylosing spondylitis.},
  author = {D A Gordon and M L Russell and M A Ogryzlo and R S McPhedran},
  year = {1973},
  doi = {10.7326/0003-4819-79-1-139\_2},
  url = {https://pubmed.ncbi.nlm.nih.gov/4721168/},
  note = {Source identifier: 4721168}
}