@misc{indiciaefd525745a4fc,
  title = {Psoriatic arthritis.},
  author = {J D O'Duffy},
  year = {1977},
  doi = {10.1080/00325481.1977.11714516},
  url = {https://pubmed.ncbi.nlm.nih.gov/834678/},
  note = {Source identifier: 834678}
}