1878
OBJECTIVE: To determine whether activation of Epstein-Barr virus ( EBV ) replication in tumour cells of AIDS-related non-Hodgkin's lymphoma ( ARNHL ) is correlated with CD4+ cell counts and influences antibody response to EBV [ anti-Z Epstein-Barr replicative activator ( ZEBRA ), anti-early antigen ( EA ), anti-viral capsid antigen ( VCA )].
 anti-early antigen, CD4+, tumour cells, anti-Z Epstein-Barr replicative activator, ZEBRA, anti-viral capsid antigen, VCA, EA
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 anti-early antigen, CD4+, tumour cells, anti-Z Epstein-Barr replicative activator, ZEBRA, anti-viral capsid antigen, VCA, EA