... Association between ambient air pollution and birth weight in Sao Paulo, Brazil. J Epidemiol CommunityHealth 2004, 58:11-17.30. Wilhelm M, Ritz B: Local variations in CO and particulate air pollution ... traffic-related air pollution impacts on birth outcomes. EnvironHealth Perspect 2008, 116:680-686.36. Hansen C, Neller A, Williams G, Simpson R:Low levels of ambient air pollution during pregnancy and ... exposures to air pollution and the risk of SGA. Of the seven air pol-lutants s tudied, the association with NO2was t he mostrobust. On the other hand, only three studies found anassociation between...