title: [Structure and cause of primary invalidity due to digestive system diseases].
mesh_terms: D000328:Adult; D004185:Disability Evaluation; D005260:Female; D005767:Gastrointestinal Diseases / Q000150:complications / Q000453:epidemiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D014586:USSR
vernacular_title: O strukture i prichinakh pervichnoĭ invalidnosti vsledstvie zabolevaniĭ pishchevaritel'noĭ sistemy