11735
Altogether, these results support the hypothesis that the activation of NK cells involved transcriptional and post-transcriptional events , and that reactive intermediates may play an important role in the molecular processes related with the generation of a cytotoxic response by NK cells .
 NK cells, NK cells
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:
 NK cells, NK cells