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Many of the clinical side effects of these infections are associated with the production of proinflammatory cytokines , which are induced primarily by LPS , a constituent of the bacterial cell wall of Gram-negative bacteria .
 proinflammatory cytokines
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:
 proinflammatory cytokines