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( C and D ) Effect of increasing the NK / DC ratio ( DCs alone ; NK : DC - 1 : 5 ; 1 : 1 ; 5 : 1 ) on ( C ) TNF - alpha and ( D ) IL - 12 p40 production .
 NK, DC, DCs, NK, DC
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 NK, DC, DCs, NK, DC