@misc{indiciaec93e29f1ecd3,
  title = {Smoking is a risk factor for multiple sclerosis.},
  author = {Trond Riise and Monica W Nortvedt and Alberto Ascherio},
  year = {2003},
  doi = {10.1212/01.wnl.0000081305.66687.d2},
  url = {https://pubmed.ncbi.nlm.nih.gov/14581676/},
  note = {Source identifier: 14581676}
}