Children with peptic ulceration.
D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D010437:Peptic Ulcer / Q000453:epidemiology*; D010438:Peptic Ulcer Hemorrhage / Q000453:epidemiology; D015043:Zollinger-Ellison Syndrome / Q000453:epidemiology