@misc{indiciae98c7e2ad6de3,
  title = {Simplified duct cannulation in sialography.},
  author = {K J Hettwer},
  year = {1969},
  doi = {10.1016/0030-4220(69)90407-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/5259447/},
  note = {Source identifier: 5259447}
}