@misc{indiciae6f2a34a7a2ba,
  title = {Pneumoperitoneum--a review.},
  author = {K M Hillman},
  year = {1982},
  doi = {10.1097/00003246-198207000-00015},
  url = {https://pubmed.ncbi.nlm.nih.gov/7044684/},
  note = {Source identifier: 7044684}
}