METHODS	The concentration of serum cytokines such as interleukin-1 ( IL-1 ) , interleukin-2 ( IL-2 ) , interleukin-6 ( IL-6 ) and tumor necrosis factor-alpha ( TNF-alpha ) , the peripheral blood cell counts of total lymphocyte , T-lymphocyte , B lymphocyte , and T lymphocyte subsets ( CD3 , CD4 , CD8 , CD4/CD8 ) as well as the levels of IgA , IgG , IGM and C-reactive protein ( CRP ) were measured on the day before operation , the first morning after operation and at the end of study .\