@misc{indiciae4e7f8987a692,
  title = {Exploratory treatment trials in multiple sclerosis using MRI: sample size calculations for relapsing-remitting and secondary progressive subgroups using placebo controlled parallel groups.},
  author = {N Tubridy and H J Ader and F Barkhof and A J Thompson and D H Miller},
  year = {1998},
  doi = {10.1136/jnnp.64.1.50},
  url = {https://pubmed.ncbi.nlm.nih.gov/9436727/},
  note = {Source identifier: 9436727}
}