@misc{indiciae85e898ce9ccb,
  title = {Abdominal surgery.},
  author = {C E Welch},
  year = {1969},
  doi = {10.1056/nejm196902272800906},
  url = {https://pubmed.ncbi.nlm.nih.gov/4974161/},
  note = {Source identifier: 4974161}
}