@misc{indiciae25c650416d7d,
  title = {Rectal and anal endosonography.},
  author = {N Mortensen},
  year = {1992},
  doi = {10.1136/gut.33.2.148},
  url = {https://pubmed.ncbi.nlm.nih.gov/1541406/},
  note = {Source identifier: 1541406}
}