13540
Our results demonstrated that both cigarette smoking and OGG1 polymorphism can affect the sperm 8 - OHdG levels .
 Chemical: 8 - OHdG
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: 8 - OHdG