1[1]Kinnan I,Zhao K,Wang Y,et al.Increased apoptosis of bone marow pre-B cells in old mice associated with their low number[J].Int Immunol,1998,(10):1385-92.
2[2]Plett A,Murasko PM.Genetic diferencesinthe ageassociated decrase in inducibility of natural killer cells by interferon-alplla[J].Mech Aging Dev,2002,(112):197-215.