@misc{indiciae1b1e18388d3b,
  title = {Upper gastrointestinal haemorrhage.},
  author = {B R Macdougall and K J Mitchell and P G Wheeler and R Williams},
  year = {1977},
  doi = {10.1016/s0140-6736(77)91976-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/65593/},
  note = {Source identifier: 65593}
}