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The massive production of TNF - alpha in the cultures at the lowest ratios was mediated primarily by DCs in the culture due to the low number of NK cells ( 2 x 104 cells per well ) used in these experiments .
 DCs, NK cells, cells
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 DCs, NK cells, cells