pSTAT3 expression and prognosis within DLBCL molecular subtypes. (A) Correlation of pSTAT3 with GCB and non-GCB DLBCL (n = 38) subtypes. (B-C) EFS analysis by pSTAT3 positivity in ER-CHOP–treated GCB (n = 26; B) and non-GCB (n = 12; C) DLBCL patients.