@misc{indiciae93751f1187fb,
  title = {Multiple sclerosis in northern Norway.},
  author = {A S de Graaf},
  year = {1974},
  doi = {10.1159/000114326},
  url = {https://pubmed.ncbi.nlm.nih.gov/4853293/},
  note = {Source identifier: 4853293}
}