TY  - RPRT
TI  - Why should preterm births be rising?
AU  - A H Shennan
AU  - S Bewley
PY  - 2006
DO  - 10.1136/bmj.332.7547.924
UR  - https://pubmed.ncbi.nlm.nih.gov/16627490/
ID  - 16627490
ER  -