11251
Investigating cytokines known to affect B cell differentiation , we have recently shown that IL-6 production is augmented by RA .
 cytokines, IL-6
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:
 cytokines, IL-6