Lactose malabsorption.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000818:Animals; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007787:Lactose Intolerance / Q000150:complications* / Q000175:diagnosis / Q000453:epidemiology; D008875:Middle Aged; D008892:Milk / Q000009:adverse effects*