title: ADHD, lead, and PCBs: appropriate comparison studies.
authors: Jack
authors: J
authors: Brondum
mesh_terms: D001289:Attention Deficit Disorder with Hyperactivity / Q000139:chemically induced* / Q000453:epidemiology*; D004785:Environmental Pollutants / Q000009:adverse effects*; D006801:Humans; D007854:Lead / Q000009:adverse effects*; D011078:Polychlorinated Biphenyls / Q000009:adverse effects*
chemical_list: D004785:Environmental Pollutants; D007854:Lead; D011078:Polychlorinated Biphenyls