@misc{indiciaeeabba68273c5,
  title = {Nonvisualized gallbladder on oral cholecystography: implications for lithotripsy.},
  author = {K Wong and O Ekberg and I Laufer and P F Malet and P Arger},
  year = {1990},
  doi = {10.1007/bf01888754},
  url = {https://pubmed.ncbi.nlm.nih.gov/2180774/},
  note = {Source identifier: 2180774}
}