HLA-A and Epstein-Barr virus infection: These results, from two independent cohorts, affirm the associations of GABBR1, HLA-F, HLA-A, and HCG9 with NPC in the Han Chinese population. HLA-A and HCG9 have been reported to be associated with EBV-positive Hodgkin lymphoma and infectious mononucleosis caused by EBV infection [29, 30].