
Keywords: ELISA; enzyme-linked immunosorbent assay; SNR; signal-to-noise ratio; EBV; Epstein-Barr virus; NPC; nasopharyngeal carcinoma; BSA; bovine serum albumin; NFDM; nonfat dry milk; PVA; poly(vinyl alcohol); PVP; poly(vinyl pyrrolidone); PBS; phosphate buffered