@misc{indiciaedef5f12ef04f,
  title = {Pathologic classification systems in MS: what is their significance?},
  author = {S K Ludwin},
  year = {2005},
  doi = {10.1177/135245850501100123},
  url = {https://pubmed.ncbi.nlm.nih.gov/15732280/},
  note = {Source identifier: 15732280}
}