@misc{indiciae3e123f673e00,
  title = {Primary progressive multiple sclerosis.},
  author = {A J Thompson and C H Polman and D H Miller and W I McDonald and B Brochet and X Filippi M Montalban and J De Sá},
  year = {1997},
  doi = {10.1093/brain/120.6.1085},
  url = {https://pubmed.ncbi.nlm.nih.gov/9217691/},
  note = {Source identifier: 9217691}
}