TY  - RPRT
TI  - No easy answers for predicting preterm labor.
AU  - Catherine Y Spong
PY  - 2002
DO  - 10.1016/s0029-7844(02)02138-5
UR  - https://pubmed.ncbi.nlm.nih.gov/12151139/
ID  - 12151139
ER  -