10060
Freshly prepared PBMCs , stimulated or not with Toll - like receptor ( TLR ) 1 - 9 agonists , a T cell mitogen ( phytohemagglutinin A ) or mite allergen extract were cultured in the presence or absence of MWCNTs .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None