@misc{indiciae411f0c862bc4,
  title = {Petrosal versus cavernous sinus sampling.},
  author = {E H Oldfield and J L Doppman},
  year = {1998},
  doi = {10.3171/jns.1998.89.5.0890},
  url = {https://pubmed.ncbi.nlm.nih.gov/9817432/},
  note = {Source identifier: 9817432}
}