@misc{indiciaed72e73bf3f7f,
  title = {Cluster Headache and Cluster Variants.},
  author = {Marc E. Lenaerts},
  year = {2003},
  doi = {10.1007/s11940-996-0014-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/14516523/},
  note = {Source identifier: 14516523}
}