@misc{indiciae3a00d9a1ecbe,
  title = {If you don't know.},
  author = {J L Berk},
  year = {1977},
  doi = {10.1001/archsurg.1977.01370010019003},
  url = {https://pubmed.ncbi.nlm.nih.gov/831669/},
  note = {Source identifier: 831669}
}