title: Genetic aspects of temperamental development: a follow-up study of twins from infancy to six years of age.
mesh_terms: D002648:Child; D005260:Female; D005500:Follow-Up Studies; D005824:Genetics, Behavioral; D006801:Humans; D007223:Infant; D008297:Male; D010551:Personality; D010553:Personality Development; D011247:Pregnancy; D013694:Temperament; D014427:Twins / Q000523:psychology*; D014429:Twins, Dizygotic / Q000523:psychology*; D014430:Twins, Monozygotic / Q000523:psychology*