@misc{indiciaec9c7b8e96bd5,
  title = {The trifurcation headache.},
  author = {P T Pacik},
  year = {1981},
  doi = {10.1097/00006534-198112000-00034},
  url = {https://pubmed.ncbi.nlm.nih.gov/7029583/},
  note = {Source identifier: 7029583}
}