Prevalence of Helicobacter pylori and its CagA subtypes in gastric cancer and duodenal ulcer at an Austrian tertiary referral center over 25 years. - Kamogawa-Schifter Y; Yamaoka Y; Uchida T; Beer A; Tribl B; Schöniger-Hekele M; Trauner M; Dolak W (PloS one, 2018)