Letter: levels of fluoride.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005457:Fluoridation; D005459:Fluorides / Q000378:metabolism* / Q000633:toxicity; D009050:Fluorosis, Dental / Q000139:chemically induced; D006801:Humans; D007223:Infant; D013662:Tea; D006113:United Kingdom; D014481:United States
D013662:Tea; D005459:Fluorides