@misc{indiciae644714f1a8ac,
  title = {Survival in multiple sclerosis.},
  author = {S Poser and J F Kurtzke and W Poser and G Schlaf},
  year = {1989},
  doi = {10.1016/0895-4356(89)90089-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/2918325/},
  note = {Source identifier: 2918325}
}