@misc{indiciae7c9f515fd36b,
  title = {Migraine headache variants.},
  author = {F G Freitag},
  year = {1989},
  doi = {10.1097/00002508-198903000-00004},
  url = {https://pubmed.ncbi.nlm.nih.gov/2520376/},
  note = {Source identifier: 2520376}
}