@misc{indiciae2d8f103f3d0c,
  title = {Headache classification: status praesens.},
  author = {G W Bruyn},
  year = {1993},
  doi = {10.1177/0333102493013s1204},
  url = {https://pubmed.ncbi.nlm.nih.gov/8500141/},
  note = {Source identifier: 8500141}
}