EcotoxicologyEndrinAldrinEcologyHeptachlorEnvironmental MonitoringLakesWater Pollutants, ChemicalEnvironmental PollutantsRisk AssessmentConduct DisorderEcosystemChinaAntisocial Personality DisorderResearch DesignAttention Deficit and Disruptive Behavior DisordersCodes of EthicsEthics, ResearchAttention Deficit Disorder with HyperactivityChild Behavior DisordersUnited StatesClinical Trials as Topic