TKT and extranodal nasal NK/T cell lymphoma: In the sPLS-DA analysis, the top 10 anti-EBV IgG antibodies that were most informative for classifying NKTCL status were those targeting EBNA3A, BALF2, BRLF1, thymidine kinase (TK), BMRF1, and BZLF1 (Supplementary Fig. 2), largely consistent with the most significant antibodies defined using the t-test.