@misc{indiciaeee00b8b36d8e,
  title = {Changing patterns of gastrointestinal bleeding.},
  author = {A G Greenburg and R P Saik and R H Bell and G M Collins},
  year = {1985},
  doi = {10.1001/archsurg.1985.01390270079013},
  url = {https://pubmed.ncbi.nlm.nih.gov/3871606/},
  note = {Source identifier: 3871606}
}