Attention Deficit Disorder with HyperactivityMethylphenidateLearning DisordersCentral Nervous System StimulantsAttentionHyperkinesisAttention Deficit and Disruptive Behavior DisordersPropylaminesChild BehaviorNeuropsychological TestsReceptors, Dopamine D4Bipolar DisorderMental DisordersDiagnostic and Statistical Manual of Mental DisordersConduct DisorderImpulsive BehaviorAdrenergic Uptake InhibitorsDextroamphetamineChild Welfare