title: [Unsolved problems of peptic ulcer].
authors.forename: N V
authors.initials: NV
authors.lastname: El'shteĭn
authors.forename: Iu Ia
authors.initials: IuIa
authors.lastname: Kheĭnla
authors.forename: U B
authors.initials: UB
authors.lastname: Mardna
authors.forename: E R
authors.initials: ER
authors.lastname: Lond
mesh_terms: D004381:Duodenal Ulcer / Q000453:epidemiology / Q000209:etiology*; D005260:Female; D006801:Humans; D008297:Male; D012008:Recurrence; D012621:Seasons; D012737:Sex Factors; D013276:Stomach Ulcer / Q000453:epidemiology / Q000209:etiology*
vernacular_title: Nereshennye voprosy iazvennoĭ bolezni.