@misc{indiciaef5b7c9ecb1f9,
  title = {Acute upper gastrointestinal bleeding.},
  author = {J A Schaffner},
  year = {1989},
  doi = {10.2165/00003495-198937010-00007},
  url = {https://pubmed.ncbi.nlm.nih.gov/2651090/},
  note = {Source identifier: 2651090}
}