@misc{indiciaeec5685e409e0,
  title = {Geography in multiple sclerosis.},
  author = {J F Kurtzke},
  year = {1977},
  doi = {10.1007/bf00312546},
  url = {https://pubmed.ncbi.nlm.nih.gov/67196/},
  note = {Source identifier: 67196}
}