passages.id: split_4_test_842_passage
passages.type: progene_text
passages.text: To clarify the role of hemodialysis biocompatibility on IL-12 production and uremic immunodeficiency , we have studied the IL-12 and IFN-gamma release by PBMC harvested from 12 patients dialyzed with cuprophan membrane ( CU ) , eight patients dialyzed with polymethylmethacrylate membrane ( PMMA ) , and eight nondialyzed uremic patients ( UR ) .