(A–E) Tumor cells (A and C) and intratumoral T cells (B) isolated from lymphoma biopsy samples (A–C) or lymphoma cell lines (D and E) were incubated in triplicate in the presence or absence of IL-4 (20 ng/ml). After 48 h, CCL17 production was assessed in the culture supernatants by ELISA. FL, follicular lymphoma; DLBCL, diffuse large B-cell lymphoma; MCL, mantle cell lymphoma; SMZL, splenic marginal-zone lymphoma; EJ-1, SKI, SUDHL4, PFEIFFER, and TOLEDO, DLBCL cell lines; RL, DHL-16, and DOHH2, transformed FL cell lines; Raji and Daudi, Burkitt’s lymphoma cell lines; and Mino and Granta519, MCL cell lines.