8697
We found that WEV alone and WEV + NP decreased the viability of all cell types tested ( PCa cells isolated from patient samples , PC3 cells and LNCaP cells ) using an MTT assay .
 MTT
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 MTT