@misc{indiciaeca7ac9b4a870,
  title = {Rectal endosonography.},
  author = {U Hildebrandt and G Feifel and K W Ecker},
  year = {1989},
  doi = {10.1016/0950-3528(89)90016-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/2692730/},
  note = {Source identifier: 2692730}
}