title: [Morbidity of twins and singly-born children].
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D004200:Diseases in Twins / Q000453:epidemiology*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007623:Kazakhstan; D009017:Morbidity; D012140:Respiratory Tract Diseases / Q000453:epidemiology
vernacular_title: Zabolevaemost' bliznetsov i odnochnorozhdennykh deteĭ.