@misc{indiciae4b0f5fd1fbac,
  title = {Perforated duodenal ulcer.},
  author = {J R Rees and K G Swan and B Thorbjarnarson},
  year = {1970},
  doi = {10.1016/s0002-9610(70)80047-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/5488331/},
  note = {Source identifier: 5488331}
}