@misc{indiciae80fa4ac9f030,
  title = {What caused the headache?},
  author = {M Ziai},
  year = {1970},
  doi = {10.1177/000992287000901019},
  url = {https://pubmed.ncbi.nlm.nih.gov/4951754/},
  note = {Source identifier: 4951754}
}