Cohort study of respiratory hospital admissions, air quality and sociodemographic factors in preterm infants born in California.

Steurer MA, Costello J, Baer RJ, Oltman SP, Feuer SK, Pacheco-Werner T, Rogers E, Jankowska MM, Block J, McCarthy M, Pantell MS, Chambers C, Ryckman KK, Jelliffe-Pawlowski LL