@misc{indiciae4368bb4f3583,
  title = {Mixed leucocyte reaction in multiple sclerosis.},
  author = {B Källén and O Nilsson},
  year = {1971},
  doi = {10.1038/newbio229091a0},
  url = {https://pubmed.ncbi.nlm.nih.gov/5280345/},
  note = {Source identifier: 5280345}
}