Stieb DM, Chen L, Beckerman BS, Jerrett M, Crouse DL, Omariba DWR, Peters PA, van Donkelaar A, Martin RV, Burnett RT, Gilbert NL, Tjepkema M, Liu S, Dugandzic RM. Associations of Pregnancy Outcomes and PM 2.5 in a National Canadian Study. Environ Health Perspect. 2016 Feb;124(2):243–9. doi: 10.1289/ehp.1408995.