@misc{indiciae2228bb902caa,
  title = {Severe headache and vacation.},
  author = {M Sillanpää and L Koivusilta},
  year = {1989},
  doi = {10.1111/j.1526-4610.1989.hed2909574.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/2583995/},
  note = {Source identifier: 2583995}
}