@misc{indiciae0f9af03dd562,
  title = {First-trimester Down syndrome screening.},
  author = {Terrence W Hallahan and David A Krantz and V James Macri and Thomas J Shine},
  year = {2006},
  doi = {10.1373/clinchem.2005.059279},
  url = {https://pubmed.ncbi.nlm.nih.gov/16391341/},
  note = {Source identifier: 16391341}
}