Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
This histogram shows the difference in the mean serum level of EBV IgA antibodies measured in ELISA OD in HNCA as one group, NPC, HPC, and CL patients as well as control subjects. The mean serum level of EBV IgA antibodies in NPC patients was significantly higher than in CL, HPC, HNCA and control groups.
