TY  - RPRT
TI  - Early amniocentesis versus chorionic villus sampling.
AU  - B Eiben
AU  - W Hammans
AU  - W Trawicki
AU  - R Goebel
PY  - 1998
UR  - https://pubmed.ncbi.nlm.nih.gov/9602491/
ID  - 9602491
ER  -