@misc{indiciae9688dd2fb2a5,
  title = {Anal canal versus rectal wall sampling.},
  author = {B A Evans},
  year = {1978},
  doi = {10.1136/sti.54.6.441-a},
  url = {https://pubmed.ncbi.nlm.nih.gov/737519/},
  note = {Source identifier: 737519}
}