@misc{indiciaecb2b0d595fda,
  title = {Classification of primary headaches.},
  author = {R B Lipton and M E Bigal and T J Steiner and S D Silberstein and J Olesen},
  year = {2004},
  doi = {10.1212/01.wnl.0000133301.66364.9b},
  url = {https://pubmed.ncbi.nlm.nih.gov/15304572/},
  note = {Source identifier: 15304572}
}