title: Genetic influence in the expression of affectivity: twin study of children and adolescents.
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D004644:Emotions / Q000502:physiology*; D005260:Female; D006801:Humans; D007406:Interview, Psychological; D008297:Male; D008957:Models, Genetic; D013850:Thinking / Q000502:physiology; D014427:Twins / Q000523:psychology*; D014429:Twins, Dizygotic / Q000523:psychology; D014430:Twins, Monozygotic / Q000523:psychology