@misc{indiciae3458d14996fb,
  title = {Proctosigmoidoscopy: when and why?},
  author = {J Drexler},
  year = {1972},
  doi = {10.1056/nejm197203232861221},
  url = {https://pubmed.ncbi.nlm.nih.gov/5060502/},
  note = {Source identifier: 5060502}
}