@misc{indiciaed413ce2fec83,
  title = {Trisomy 18: behavioral and structural abnormalities. An ultrasonographic case study.},
  author = {P G Hepper and S Shahidullah},
  year = {1992},
  doi = {10.1046/j.1469-0705.1992.02010048.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/12797007/},
  note = {Source identifier: 12797007}
}