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In contrast, expression of the activation-dependent cell surface markers CD25 and CD69 was within normal limits.
 CD69, activation-dependent cell surface markers, CD25, cell surface markers
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:
 CD69, activation-dependent cell surface markers, CD25, cell surface markers