@misc{10029,
  author = {M. Hernan and S. Jick and G. Logroscino and M. Olek and A. Ascherio and H. Jick},
  title = {Cigarette smoking and the progression of multiple sclerosis},
  year = {2005},
  journal = {Brain},
  volume = {128},
  number = {Pt 6},
  pages = {1461-5},
  issn = {0006-8950},
  doi = {10.1093/brain/awh471},
}