Lactase deficiency in a rural area of Mexico.
D000017:ABO Blood-Group System; D000293:Adolescent; D000328:Adult; D000368:Aged; D000818:Animals; D001786:Blood Glucose / Q000378:metabolism; D004032:Diet; D005260:Female; D005787:Gene Frequency; D006801:Humans; D007787:Lactose Intolerance / Q000453:epidemiology; D007789:Lactose Tolerance Test; D008297:Male; D008800:Mexico; D008875:Middle Aged; D008892:Milk; D010641:Phenotype; D012424:Rural Population
D000017:ABO Blood-Group System; D001786:Blood Glucose