@misc{indiciaefef014412d5c,
  title = {Headache research methodology.},
  author = {Richard B Lipton and Marcelo E Bigal},
  year = {2005},
  doi = {10.1111/j.1526-4610.2005.05106.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/15953271/},
  note = {Source identifier: 15953271}
}