@misc{indiciae6fc437b04570,
  title = {Protective finger device for use in endoscopic procedures.},
  author = {M L Butler},
  year = {1973},
  doi = {10.1136/gut.14.7.581},
  url = {https://pubmed.ncbi.nlm.nih.gov/4729928/},
  note = {Source identifier: 4729928}
}