Publication examining and comparing PAHs found in wristbands, active sampling PUFs, and urinary derivatives in a 48-hr spot sample in a cohort of pregnant women in an Urban environment. More significant correlations between hydroxy-biomarkers in urine samples were found using wristband data than active PUF samples.  Partition coefficients were roughly estimated between silicone and PAHs, opening the door to new ways to back-calculate wristband data to air concentrations.