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Cytokine profiles in study subjects’ PBMC cultures stimulated with XG‐7 cells. PBMC (10 × 107 cells) from NPC patients, survivors and donors were stimulated with XG‐7 and cultured for 10 days in the absence of exogenous IL‐2. The culture supernatants were collected every 2 days for determination of IFN‐γ (A), IL‐12p40 (B), IL‐15 (C) and TNF‐α (D) by ELISA.
