PDLIM7 and Epstein-Barr virus infection: In order to evaluate the effect of traces of EBV infection in the expression of immune genes, initially, three groups were defined: i) EBV+ cases, with ≥ 20% EBERs + cells which also were positive for EBV transcripts, ii) EBV− Traces+ cases, including EBV− cases with < 20% EBERs + cells but expressing LMP1 and/or EBNA2 transcripts, and iii) Traces− cases, negative for both approaches.