@misc{indiciae6d5631b164ce,
  title = {Normal gallbladder ejection fraction after morphine augmentation.},
  author = {D M Achong and E Oates},
  year = {1999},
  doi = {10.1097/00003072-199911000-00001},
  url = {https://pubmed.ncbi.nlm.nih.gov/10551461/},
  note = {Source identifier: 10551461}
}