@misc{indiciaeaf941fcb59f1,
  title = {Biliary tract melanoma.},
  author = {A J Cohen and L D Thompson and D P Jaques and J C d'Avis},
  year = {1990},
  url = {https://pubmed.ncbi.nlm.nih.gov/2106644/},
  note = {Source identifier: 2106644}
}