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This work aimed to ascertain the role of kappaB-responsive elements of the human immunodeficiency virus type 1 ( HIV-1 ) enhancer not only in early initiation but also in long-term maintenance of proviral transcription in cells of the monocytic lineage .
 human immunodeficiency virus type 1 ( HIV-1 ) enhancer, kappaB-responsive elements, monocytic lineage
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:
 human immunodeficiency virus type 1 ( HIV-1 ) enhancer, kappaB-responsive elements, monocytic lineage