@misc{indiciae4dfb17aa14ad,
  title = {Bevel direction and postdural puncture headache: a meta-analysis.},
  author = {Jeffrey M Richman and Emily M Joe and Seth R Cohen and Andrew J Rowlingson and Robert K Michaels and Maggie A Jeffries and Christopher L Wu},
  year = {2006},
  doi = {10.1097/01.nrl.0000219638.81115.c4},
  url = {https://pubmed.ncbi.nlm.nih.gov/16832241/},
  note = {Source identifier: 16832241}
}