再求助一些英文文献，附链接，谢谢！！！

tjutiger

tilte：Administration of 6-gingerol greatly enhances the number of tumor-infiltrating lymphocytes in murine tumors; [4 K/ `# u1 E3 j
链接：http://www.ncbi.nlm.nih.gov/pubm ... n%20murine%20tumors
  O$ a, {1 D4 u  G  V' n# w6 vtilterospects for the use of NK cells in immunotherapy of human cancer.
, ~. ?; B8 Y6 h链接：http://www.ncbi.nlm.nih.gov/pubmed/17438573+ |( A! o, m. R% k; @
tilte: The outs and the ins of sphingosine-1-phosphate in immunity.  e& N/ D& R. s1 q
链接：http://www.ncbi.nlm.nih.gov/pubm ... ate%20in%20immunity