TY  - RPRT
TI  - Second trimester chorioamniotic separation and amniocentesis.
AU  - K G Børlum
PY  - 1989
DO  - 10.1016/0028-2243(89)90091-9
UR  - https://pubmed.ncbi.nlm.nih.gov/2924991/
ID  - 2924991
ER  -