@misc{indiciaec39e17920621,
  title = {Ankylosing spondylitis without HLA B27.},
  author = {J M Van der Linden and K De Ceulaer and L K Van Romunde and A Cats},
  year = {1977},
  url = {https://pubmed.ncbi.nlm.nih.gov/266598/},
  note = {Source identifier: 266598}
}