1484
These results suggest that AKRs induction by PAHs in smokers ' PBLs is associated with BMI ; therefore , the role of adipose tissue accumulation in PAHs ' effects needs further investigation .
 PAHs, PAHs
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 PAHs, PAHs