@misc{indiciae8aabfb201afa,
  title = {Ankylosing spondylitis.},
  author = {J J Calabro and B A Maltz},
  year = {1970},
  doi = {10.1056/nejm197003122821107},
  url = {https://pubmed.ncbi.nlm.nih.gov/4905328/},
  note = {Source identifier: 4905328}
}