Thí điểm đưa flo vào muối ăn
Viện Răng hàm mặt Quốc gia vừa cho biết, từ tháng 10-2008, Việt Nam sẽ thí điểm trộn flo vào muối ăn, nhằm làm giảm tỷ lệ sâu răng...
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