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In this review, Paul Scholl and Raif Geha discuss recent advances in our understanding of mechanisms of MHC class II signaling and analyse their role in human B-cell activation .
 MHC class II, B-cell
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:
 MHC class II, B-cell