3886
In this study, we examined seven EBV -positive gastric carcinoma tissues for viral gene expression at the mRNA level , from which studies on the EBV oncogenicity in human epithelial cells will benefit.
 ( cell type: human epithelial cells, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( cell type: human epithelial cells, None) 