@misc{indiciae256856ea9bb8,
  title = {Does interferon beta help in secondary progressive MS?},
  author = {Jeffrey A Cohen and Jack P Antel},
  year = {2004},
  doi = {10.1212/01.wnl.0000147171.32178.48},
  url = {https://pubmed.ncbi.nlm.nih.gov/15557486/},
  note = {Source identifier: 15557486}
}