@misc{indiciae4caeb0ef56b7,
  title = {A real headache!},
  author = {J E Jackson and C J O'Donnell},
  year = {1989},
  doi = {10.1259/0007-1285-62-741-867},
  url = {https://pubmed.ncbi.nlm.nih.gov/2790431/},
  note = {Source identifier: 2790431}
}