@misc{indiciae5bc310b3c547,
  title = {Cerebral blood flow changes in cluster headache.},
  author = {J W Norris and V C Hachinski and P W Cooper},
  year = {1976},
  doi = {10.1111/j.1600-0404.1976.tb04367.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/973557/},
  note = {Source identifier: 973557}
}