TY  - RPRT
TI  - Trisomy 18: behavioral and structural abnormalities. An ultrasonographic case study.
AU  - P G Hepper
AU  - S Shahidullah
PY  - 1992
DO  - 10.1046/j.1469-0705.1992.02010048.x
UR  - https://pubmed.ncbi.nlm.nih.gov/12797007/
ID  - 12797007
ER  -