@misc{indiciae86dd4eb7c24b,
  title = {Multi-centre versus single-centre trials in migraine.},
  author = {C Hedman and A R Andersen and J Olesen},
  year = {1987},
  doi = {10.1159/000110119},
  url = {https://pubmed.ncbi.nlm.nih.gov/3683713/},
  note = {Source identifier: 3683713}
}