@article{Flower2013,
author = {Flower, A. and Shawe, J. and Stephenson, J. and Doyle, P.},
title= {Pregnancy planning, smoking behaviour during pregnancy, and neonatal outcome: UK millennium cohort study},
year = {2013},
doi = {10.1186/1471-2393-13-238},
volume = {13},
number = {1},
pages = {238--244},
}