@misc{indiciae94b706987d92,
  title = {Gastrointestinal bleeding.},
  author = {S Baum and M Nusbaum and H J Tumen},
  year = {1970},
  doi = {10.1016/s0140-6736(70)92686-3},
  url = {https://pubmed.ncbi.nlm.nih.gov/4193346/},
  note = {Source identifier: 4193346}
}