@misc{indiciae862f95019c06,
  title = {The double duct sign.},
  author = {J C Dearden and L Ayaru and V Wong and N van Someren},
  doi = {10.1016/s0140-6736(04)16683-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/15262111/},
  note = {Source identifier: 15262111}
}