10Lin YS, Lin LC, Lin SW, et al. Discrep- ancy of the effects of zinc supplementa- tion on the prevention of radiotherapy-in-duced mucositis between patients with nasopharyngeal carcinoma and those with oral cancers.- subgroup analysis of a doub- le-blind, randomized study [J]. Nutr Can cer, 2010, 62(5): 682-691.