@misc{indiciae1c2e7867cb98,
  title = {Cervical ultrasonography.},
  author = {J D Iams},
  year = {1997},
  doi = {10.1046/j.1469-0705.1997.10030156.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/9339521/},
  note = {Source identifier: 9339521}
}