@misc{indiciaeec582e8aeb8a,
  title = {Update on cluster headache.},
  author = {Arne May and Massimo Leone},
  year = {2003},
  doi = {10.1097/01.wco.0000073934.19076.0e},
  url = {https://pubmed.ncbi.nlm.nih.gov/12858070/},
  note = {Source identifier: 12858070}
}