| http://www.w3.org/ns/prov#value | - Susanna Visser, an epidemiologist at the CDC and the lead author of the report, says that factors including lead exposure, low birth weight, and premature birth have all been shown to contribute to ADHD symptoms. ???This collection of risk factors could be moving in a direction that causes certain demographic groups to have higher rates of ADHD,??? she says. ???We have to figure out what???s drivi
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