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Epstein-Barr virus ( EBV ), the causative agent of infectious mononucleosis , is a human herpesvirus associated with epithelial cell malignancies ( nasopharyngeal carcinoma ) as well as B-cell malignancies .
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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:
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