@misc{indiciae28f7deae5e03,
  title = {Cluster headache.},
  author = {J R Graham},
  year = {1974},
  doi = {10.1080/00325481.1974.11713853},
  url = {https://pubmed.ncbi.nlm.nih.gov/4851060/},
  note = {Source identifier: 4851060}
}