Fluoridation and the occurrence of Down's syndrome.
D004314:Down Syndrome / Q000139:chemically induced* / Q000453:epidemiology; D005260:Female; D005457:Fluoridation / Q000009:adverse effects*; D006801:Humans; D007231:Infant, Newborn; D008404:Massachusetts; D008423:Maternal Age; D008431:Maternal-Fetal Exchange; D011247:Pregnancy