passages.id: split_4_test_849_passage
passages.type: progene_text
passages.text: Under stimulation , IFN-gamma release was lower in CU ( 13.42 +/- 12.04 IU / ml ) than in CON , UR , and PMMA ( 51.84 +/- 30.74 , 32.16 +/- 13.86 , and 32.16 +/- 13.86 IU / ml , respectively ; P < 0.01 ) .