-Carotene–rich orange-fleshed sweet potato improves the vitamin A status of primary school children assessed with the modified-relative-dose

http://www.100md.com 《美国临床营养学杂志》 2005年第5期

    百拇医药网 http://www.100md.com/html/DirDu/2006/11/14/29/65/77.htm

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