title: [Approximately annual periodicity of Helicobacter pylori prevalence].
authors.forename: C
authors.initials: C
authors.lastname: Raschka
authors.forename: W
authors.initials: W
authors.lastname: Schorr
authors.forename: H J
authors.initials: HJ
authors.lastname: Koch
mesh_terms: D005858:Germany / Q000453:epidemiology; D016481:Helicobacter Infections / Q000453:epidemiology*; D016480:Helicobacter pylori; D006801:Humans; D010507:Periodicity; D015995:Prevalence; D012621:Seasons