@misc{indiciae236d36a59242,
  title = {First-trimester Down syndrome screening.},
  author = {J N Macri and F Orlandi},
  year = {2000},
  doi = {10.1067/mob.2000.109731},
  url = {https://pubmed.ncbi.nlm.nih.gov/11120540/},
  note = {Source identifier: 11120540}
}