[Lactose malabsorption and its ethnic influence in healthy Chinese].
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001944:Breath Tests; D002648:Child; D002675:Child, Preschool; D002681:China; D005006:Ethnicity; D005260:Female; D005696:Galactosidases / Q000172:deficiency*; D006801:Humans; D006859:Hydrogen / Q000032:analysis; D007787:Lactose Intolerance / Q000378:metabolism*; D007789:Lactose Tolerance Test / Q000379:methods; D008297:Male; D001616:beta-Galactosidase / Q000172:deficiency*
D006859:Hydrogen; D005696:Galactosidases; D001616:beta-Galactosidase