TY  - RPRT
TI  - Preterm birth prevention: where are we?
AU  - R K Creasy
PY  - 1993
DO  - 10.1016/0002-9378(93)90373-q
UR  - https://pubmed.ncbi.nlm.nih.gov/8475969/
ID  - 8475969
ER  -