title: [Age and characteristics of the heart in twins and singletons].
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D005260:Female; D006321:Heart / Q000033:anatomy & histology*; D006801:Humans; D008297:Male; D012727:Sex Characteristics; D014427:Twins; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic
vernacular_title: Vozrastnye osobennosti serdtsa u bliznetsov i odinochnorozhdennykh.