@article{Högberg2007,
author = {Högberg, L. and Cnattingius, S.},
title= {The influence of maternal smoking habits on the risk of subsequent stillbirth: is there a causal relation?},
year = {2007},
doi = {10.1111/j.1471-0528.2007.01340.x},
journal = {BJOG},
volume = {114},
number = {6},
pages = {699--704},
}