@misc{indiciaee574aa1bf900,
  title = {Ultrasonography and acute appendicitis.},
  author = {K K Hallfeldt and M Sohn},
  year = {1994},
  doi = {10.1016/s0140-6736(94)91699-3},
  url = {https://pubmed.ncbi.nlm.nih.gov/7934421/},
  note = {Source identifier: 7934421}
}