revenu (1) santé (1) âge (1) Genes (1) Teenagers (1) Variations (1) Sex (1) Science (1) Poor (1) Neighborhoods (1) Income (1) Households (1) Health (1) Gene expression (1) Expression (1) Experience (1) Equality (1) Competition (1) Brain (1) Axes (1) Age (1) Teenage girls (1) Adolescence (1) Age (1) Health (1) cerveau (1) adolescence (1)