Maternal exposure to PM2.5 during pregnancy and asthma risk in early childhood: consideration of phases of fetal lung development.

Hazlehurst MF, Carroll KN, Loftus CT, Szpiro AA, Moore PE, Kaufman JD, Kirwa K, LeWinn KZ, Bush NR, Sathyanarayana S, Tylavsky FA, Barrett ES, Nguyen RHN, Karr CJ