@misc{indiciaec4ea675552ac,
  title = {Rheumatoid arthritis.},
  author = {J M Gumpel},
  year = {1978},
  doi = {10.1136/bmj.2.6144.1068},
  url = {https://pubmed.ncbi.nlm.nih.gov/709222/},
  note = {Source identifier: 709222}
}