@misc{indiciae6988df2c625c,
  title = {Down syndrome screening in multiple pregnancies.},
  author = {Alexandra Matias and Nuno Montenegro and Isaac Blickstein},
  year = {2005},
  doi = {10.1016/j.ogc.2004.10.001},
  url = {https://pubmed.ncbi.nlm.nih.gov/15644291/},
  note = {Source identifier: 15644291}
}