title: [Problem of epidemiologic study of borderline states among persons of 20-49 age groups].
mesh_terms: D000328:Adult; D000341:Affective Disorders, Psychotic / Q000453:epidemiology*; D000367:Age Factors; D001136:Armenia; D006801:Humans; D007046:Hysteria / Q000453:epidemiology*; D008875:Middle Aged; D009440:Neurasthenia / Q000453:epidemiology*; D011618:Psychotic Disorders / Q000453:epidemiology*
vernacular_title: K voprosu ob epidemiologicheskom izuchenii pogranichnykh sostoianiĭ vozrastnoĭ gruppy 20-49 let.