@misc{indiciaed6d4b64afe3b,
  title = {A teaching instrument for proctosigmoidoscopy.},
  author = {R TURELL},
  year = {1957},
  doi = {10.1001/jama.1957.82970360002008a},
  url = {https://pubmed.ncbi.nlm.nih.gov/13376340/},
  note = {Source identifier: 13376340}
}