Attention Deficit Disorder with HyperactivityMethylphenidateCentral Nervous System StimulantsPropylaminesAttention Deficit and Disruptive Behavior DisordersConduct DisorderAdrenergic Uptake InhibitorsRadiation DosageInhibition (Psychology)Lethal Dose 50Diagnostic and Statistical Manual of Mental DisordersNeuropsychological TestsDextroamphetamineAdministration, OralDrug Administration ScheduleReceptors, Dopamine D4Impulsive BehaviorPsychiatric Status Rating ScalesDopamine Plasma Membrane Transport ProteinsDouble-Blind MethodComorbidityTreatment OutcomeTime FactorsRadiometryExecutive FunctionParentsAttentionReaction TimeNeurofeedbackPersonality AssessmentChild BehaviorDose-Response Relationship, RadiationDose FractionationHyperkinesisRadiotherapy DosageDelayed-Action PreparationsWechsler ScalesTic DisordersSiblingsGuanfacinePemolineDyslexiaTourette SyndromePsychomotor PerformanceSeverity of Illness IndexInjections, IntravenousAnalysis of VarianceArea Under CurveBrainCase-Control StudiesLearning DisordersRadiotherapy Planning, Computer-AssistedPsychometricsHalf-LifeInfusions, IntravenousMemory, Short-TermSubstance-Related DisordersQuestionnairesCognitionSymptom AssessmentChild Development Disorders, PervasiveFollow-Up StudiesIntelligenceLongitudinal StudiesDiseases in TwinsRats, Sprague-DawleyAge FactorsPlacebosDrug Therapy, CombinationBody BurdenFacultyThermoluminescent DosimetryMagnetic Resonance ImagingDisease Models, AnimalBipolar DisorderBehavioral SymptomsAmphetamineDrug InteractionsSex FactorsRisk FactorsRelative Biological EffectivenessFood Coloring AgentsProspective StudiesEndophenotypesCognition DisordersIntelligence TestsCombined Modality TherapyReproducibility of ResultsNorepinephrine Plasma Membrane Transport ProteinsRetrospective StudiesBiological AvailabilityAntineoplastic AgentsAutistic DisorderCriminalsNeoplasmsMetered Dose InhalersMinisatellite RepeatsSelf ReportRadiation MonitoringInjections, Subcutaneous