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circSPEF2 suppresses DLBCL tumor growth and immune escape. A Representative tumor images in each group (5/group); B tumor growth curve; C tumor volume; D Western Blot checked BACH2; E IHC staining observed Ki-67 signal; F TUNEL staining detected apoptosis of tumor cells; Data were expressed as mean ± SD (N = 3). P < 0.05
