@article{Shah2000,
author = {Shah, N.R. and Bracken, M.B.},
title= {A systematic review and meta-analysis of prospective studies on the association between maternal cigarette smoking and preterm delivery},
year = {2000},
doi = {10.1016/S0002-9378(00)70240-7},
volume = {182},
number = {2},
pages = {465--472},
}