GamblingBehavior, AddictiveImpulse Control DisordersSubstance-Related DisordersImpulsive BehaviorCompulsive BehaviorRewardOpioid-Related DisordersMotivationAlcoholismTobacco Use DisorderCocaineProblem SolvingChoice BehaviorHeroin DependenceDecision MakingNeurobiologySubstance Abuse Treatment CentersMethadoneSelf AdministrationSocial ProblemsSubstance Withdrawal SyndromeDiagnostic and Statistical Manual of Mental DisordersRisk-TakingBankruptcyDopamineNarcotic AntagonistsPsychiatric Status Rating ScalesMental DisordersReinforcement (Psychology)NarcoticsComorbidityQuestionnairesBuprenorphineDopamine Uptake InhibitorsDopamine AgonistsConditioning, OperantStreet DrugsAnalgesics, OpioidNicotineBrainNucleus AccumbensUnited StatesDesensitization, PsychologicOpiumAlcohol DrinkingDrug-Seeking BehaviorNeuropsychological TestsDiagnosis, Dual (Psychiatry)Analysis of Variance