title: The structure of genotypic and environmental covariation for personality measurements: an analysis of the PEN.
mesh_terms: D004777:Environment; D005120:Extraversion, Psychological; D005260:Female; D005824:Genetics, Behavioral; D005838:Genotype; D006801:Humans; D008297:Male; D009497:Neurotic Disorders; D010552:Personality Assessment; D010641:Phenotype; D011247:Pregnancy; D011618:Psychotic Disorders; D011795:Surveys and Questionnaires; D014427:Twins