@misc{indiciaeb5845fe5ac63,
  title = {Interleukin-6 is elevated in plasma in multiple sclerosis.},
  author = {K Frei and S Fredrikson and A Fontana and H Link},
  year = {1991},
  doi = {10.1016/0165-5728(91)90020-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/1991821/},
  note = {Source identifier: 1991821}
}