2022 No https://doi.org/10.1021/acs.est.1c05084 Wang, Hui North America Experimental Other Cognative function Stress/Anxiety Other Aroclor Inhalation toxicity Metabolomics Neurotoxicity Polychlorinated biphenyls PCBs School indoor air quality Long-term exposure Experimental study exposed rats to school-simulated airborne PCBs over 91 days; observed neurobehavioral, immune, metabolic, and gene expression impacts, emphasizing school air PCB exposure as a health concern.