@misc{indiciaeaf25a3bcfb52,
  title = {Altitude headache.},
  author = {O Appenzeller},
  year = {1972},
  doi = {10.1111/j.1526-4610.1972.hed1203130.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/5075462/},
  note = {Source identifier: 5075462}
}