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Finland
Alcohol Drinking
Social Facilitation
Smoking
Parenting
Questionnaires
Friends
Environment
Registries
Social Environment
Cohort Studies
Cross-Sectional Studies
Risk Factors
Dizygotic Twins
Monozygotic Twins
Peer Group
Genetic Predisposition to Disease
Phenotype
Attention Deficit and Disruptive Behavior Disorders
Conduct Disorder
Co-Publications
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