@misc{indiciae67a06d34cd82,
  title = {Changing patterns in perforated peptic ulcer disease.},
  author = {L Gunshefski and L Flancbaum and R E Brolin and A Frankel},
  year = {1990},
  url = {https://pubmed.ncbi.nlm.nih.gov/1973032/},
  note = {Source identifier: 1973032}
}