Helicobacter pylori infection in children.
D015746:Abdominal Pain / Q000209:etiology*; D017668:Age of Onset; D002648:Child; D002675:Child, Preschool; D016481:Helicobacter Infections / Q000150:complications / Q000188:drug therapy / Q000453:epidemiology / Q000635:transmission; D016480:Helicobacter pylori; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D012307:Risk Factors