@misc{indiciae9706763786f6,
  title = {Common headache misdiagnoses.},
  author = {Robert E Ryan and Starr H Pearlman},
  year = {2004},
  doi = {10.1016/j.pop.2004.02.010},
  url = {https://pubmed.ncbi.nlm.nih.gov/15172514/},
  note = {Source identifier: 15172514}
}