CD79A and nasopharyngeal carcinoma: As shown in Table S2, among the 71 EAD/IgA‐positive but non‐NPC(FP) cases, 13, 24, and 55 subjects were TK/IgA‐, EAR/IgA‐, and TK/IgG‐negative, respectively, while in the 5 EAD/IgA‐negative NPC cases, four, four, and two subjects were TK/IgA‐, EAR/IgA‐, and TK/IgG‐positive.