@misc{indiciaefc41ccb257cb,
  title = {Early blood patch recommended.},
  author = {H J Heyman and M R Salem},
  year = {1987},
  doi = {10.1213/00000539-198703000-00020},
  url = {https://pubmed.ncbi.nlm.nih.gov/3826677/},
  note = {Source identifier: 3826677}
}