@misc{indiciaebc95129d2156,
  title = {Routine proctosigmoidoscopy: how often?},
  author = {J Drexler},
  year = {1974},
  doi = {10.1159/000224971},
  url = {https://pubmed.ncbi.nlm.nih.gov/4459743/},
  note = {Source identifier: 4459743}
}