1DONALD SM, MARTIN FRIGG. Sight and life manual on vitamin A disorders[A]. 2nd ed. Basel: Task Force Sight and Life[M]. Munich:Zuckschwerdt Publishers,2001.87-97.
2PFAHL M, CHYTIL F. Regulation of metabolism by retinoic acid and its nuclear receptors [J]. Annu Rev Nutr, 1996, 16:257-283.
3ROODENBURG AJ,WEST CE,HOVENIER R,et al. Supplemental vitamin A enhances the recovery from iron deficiency in rats with chromic vitamin A deficiency[J]. Br J Nutr, 1996,75:623-636.
