[Investigation of fluorosis caused by burning coal].
D000293:Adolescent; D000328:Adult; D000368:Aged; D000397:Air Pollution / Q000009:adverse effects*; D002648:Child; D003031:Coal / Q000009:adverse effects*; D005260:Female; D005458:Fluoride Poisoning / Q000453:epidemiology / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged
D003031:Coal