@misc{indiciaefeb320ecc3e6,
  title = {Lymphocyte abnormalities in ankylosing spondylitis.},
  author = {P T Fan and P J Clements and D T Yu and G Opelz and R Bluestone},
  year = {1977},
  doi = {10.1136/ard.36.5.471},
  url = {https://pubmed.ncbi.nlm.nih.gov/303501/},
  note = {Source identifier: 303501}
}