6Syrjala H, Sureel HM, llonen J, et al. Low CD4/CD8 T lymphocyte ratio in acute myocardial infection[J]. Clin Exp Immunol, 1991, 83(2) :326 - 328.
7Paust S, Lu L, MeCarty N, et al. Engagement of 137 on effector T cells by regulatory T cells prevents autoimmune diseade[J]. Proc Natl Acad Sci USA, 2004, 101 (28) : 10398 - 10403.