@misc{indiciae905036b27b4d,
  title = {Further studies on multiple sclerosis in Iceland.},
  author = {K R Gudmundsson and S Bergmann and O J Björnsson and A B Ellertsson},
  year = {1974},
  doi = {10.1016/0022-510x(74)90105-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/4613801/},
  note = {Source identifier: 4613801}
}