@misc{indiciaedc02d648623f,
  title = {Migraine trials: crossover or parallel group?},
  author = {J A Lewis},
  year = {1987},
  doi = {10.1159/000110120},
  url = {https://pubmed.ncbi.nlm.nih.gov/3683714/},
  note = {Source identifier: 3683714}
}