@misc{indiciaecf1b4b31ba32,
  title = {Second-trimester sonography and trisomy 18.},
  author = {Richard Bronsteen and Wesley Lee and Ivana M Vettraino and Raywin Huang and Christine H Comstock},
  year = {2004},
  doi = {10.7863/jum.2004.23.2.233},
  url = {https://pubmed.ncbi.nlm.nih.gov/14992360/},
  note = {Source identifier: 14992360}
}