16338
The present study was designed to determine whether such an IL - 6 up - regulation also occurs in response to co - treatment by PAHs and tumor necrosis factor ( TNF ) - alpha , an inflammatory cytokine commonly found in tumor microenvironment .
 Chemical: PAHs
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: PAHs