@misc{indiciae88c40a1f54f3,
  title = {Upper gastrointestinal bleeding--when to operate.},
  author = {K E Wheatley and P W Dykes},
  year = {1990},
  doi = {10.1136/pgmj.66.781.926},
  url = {https://pubmed.ncbi.nlm.nih.gov/2267204/},
  note = {Source identifier: 2267204}
}