@misc{indiciaee0e432544227,
  title = {HLA 27 positive, negative, or both?},
  author = {A Calin and M Barnett},
  year = {1980},
  doi = {10.1056/nejm198006123022418},
  url = {https://pubmed.ncbi.nlm.nih.gov/7374690/},
  note = {Source identifier: 7374690}
}