@misc{indiciaeb96b750af905,
  title = {Letter: Massive upper gastrointestinal bleeding.},
  year = {1974},
  doi = {10.1136/bmj.2.5919.609},
  url = {https://pubmed.ncbi.nlm.nih.gov/4545996/},
  note = {Source identifier: 4545996}
}