TY  - RPRT
TI  - Cervical assessment at the routine 23-week scan: standardizing techniques.
AU  - M S To
AU  - C Skentou
AU  - C Chan
AU  - A Zagaliki
AU  - K H Nicolaides
PY  - 2001
DO  - 10.1046/j.1469-0705.2001.00369.x
UR  - https://pubmed.ncbi.nlm.nih.gov/11309170/
ID  - 11309170
ER  -