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Blocking reagents for CD80 , CD86 , CD154 , CD95 , CD11a , CD50 , or IL - 12 , had no effect on the NK cell - induced TNF - alpha or IL - 12 p40 production , whereas a neutralizing antibody for IFN - gamma while not affecting TNF - alpha production partially blocked ( < 20 % ) IL - 12 p40 production induced by the NK cells ( Fig . 2 E ) .
 NK cell, NK cells
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 NK cell, NK cells