Table 1. The calculation of EBV DNA concentration (EBNA-1) by qPCR in serum of NPC patients before and after undergoing therapy.

NPRN	Calculation of concentration of EBV DNA (ng/mL)
	Before therapy	After therapy
10	0.0241	0.000285
19	0.0270	0.000211
20	0.0208	0.000107
21	0.0161	0.000278
26	0.0239	0.000117
27	0.0255	0.000127
28	0.0265	0,000325
30	0.0288	0.000288
31	0.0235	0.000113
33	0.0268	0.000095
38	0.0209	0.000075
39	0.0229	0.000069
41	0.0242	0.000084
42	0.0011	0.000081
43	0.0213	0.000072
45	0.0253	0.000089
48	0.0244	0.000102
52	0.0253	0.000108
54	0.0234	0.000071
55	0.0241	0.000088
59	0.0301	0.000061
61	0.0246	0.000102
68	0.0238	0.000090
Average	0.02324	0.00013
Standard deviation (SD)	0.0056	0.00008
Standard error of mean (SEM)	0.0012	0.0001

Note: NPRN (NPC patient registration number)