Induced expression of PD-1,a novel member of the immunoglobulin gene superfamily,upon programmed cell death .PD-1 / PD-L与慢性病毒性肝炎.国际免疫学杂志,2009,32.B7-H1 is up-regulated in HIV infection and is a novel surrogate marker of disease progression .Pd-1及其配体pd-L1 / ......