@misc{indiciae158dc4c2cd10,
  title = {External sphincterotomy at the 12 o'clock position.},
  author = {H M Carrion and B T Brown and V A Politano},
  year = {1979},
  doi = {10.1016/s0022-5347(17)56826-3},
  url = {https://pubmed.ncbi.nlm.nih.gov/439219/},
  note = {Source identifier: 439219}
}