@misc{indiciae854b085bffbc,
  title = {Single-operator hemorrhoid ligator.},
  author = {B C Cosman and I Perkash},
  year = {1993},
  doi = {10.1007/bf02050636},
  url = {https://pubmed.ncbi.nlm.nih.gov/8404392/},
  note = {Source identifier: 8404392}
}