TY  - RPRT
TI  - Chorionic villus sampling in multiple pregnancies.
AU  - Z Appelman
AU  - C Vinkler
AU  - B Caspi
PY  - 1999
DO  - 10.1016/s0301-2115(98)00290-5
UR  - https://pubmed.ncbi.nlm.nih.gov/10428330/
ID  - 10428330
ER  -