The epidemiology of peptic ulcer in childhood.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D003710:Demography; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D009518:New York; D010437:Peptic Ulcer / Q000175:diagnosis / Q000453:epidemiology* / Q000235:genetics; D012494:Sampling Studies; D012959:Socioeconomic Factors; D013315:Stress, Psychological