@misc{indiciaeadf8bfa8d1e2,
  title = {Gallbladder wall sonolucency in acute cholecystitis.},
  author = {G J Marchal and M Casaer and A L Baert and P G Goddeeris and R Kerremans and J Fevery},
  year = {1979},
  doi = {10.1148/133.2.429},
  url = {https://pubmed.ncbi.nlm.nih.gov/493531/},
  note = {Source identifier: 493531}
}