@misc{indiciaea1e22d4fdd7b,
  title = {Multiple sclerosis associated with sinusitis: case-controlled study in general practice.},
  author = {D Gay and G Dick and G Upton},
  year = {1986},
  doi = {10.1016/s0140-6736(86)90936-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/2870312/},
  note = {Source identifier: 2870312}
}