@misc{indiciae905f1f31f93d,
  title = {Early bile duct carcinomas.},
  author = {J Okamura and S Oshima and S Sakamoto and F Murakami},
  year = {1973},
  url = {https://pubmed.ncbi.nlm.nih.gov/4766285/},
  note = {Source identifier: 4766285}
}