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Permanent occupancy of the human immunodeficiency virus type 1 enhancer by NF-kappa B is needed for persistent viral replication in monocytes .
 monocytes, human immunodeficiency virus type 1 enhancer, NF-kappa B
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:
 monocytes, human immunodeficiency virus type 1 enhancer, NF-kappa B