cell-mediated immunity was assessed pre- and postoperatively by skin testing with seven common delayed type hypersensitivity ( dth ) antigens , and blood drawn immediately before and 24 hours after skin incision was analyzed for spontaneous and in vitro stimulated ( il-2 , ifn-alpha or indomethacin ) natural killer ( nk ) cell activity and pha and ppd-stimulated lymphocyte proliferation .
C0020966
cell-mediated immunity
C0003320
antigens