title: Is repeated exposure to H. pylori necessary for chronic H. pylori infection?
authors.forename: S
authors.initials: S
authors.lastname: Kugathasan
authors.forename: S J
authors.initials: SJ
authors.lastname: Czinn
mesh_terms: D002675:Child, Preschool; D002779:Cholestasis / Q000175:diagnosis; D002908:Chronic Disease; D016145:Endoscopy, Digestive System; D016481:Helicobacter Infections / Q000453:epidemiology* / Q000209:etiology*; D016480:Helicobacter pylori / Q000472:pathogenicity*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D015995:Prevalence