Who sets the rules on brushing?
Helm
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D002675:Child, Preschool; D004435:Eating; D005459:Fluorides / Q000009:adverse effects; D009050:Fluorosis, Dental / Q000209:etiology / Q000517:prevention & control; D006801:Humans; D011356:Product Labeling; D014099:Toothbrushing / Q000379:methods*
D005459:Fluorides