1796
To assess the disease risk of individuals who smoke cigarettes with altered toxicant levels , a weight - of - evidence approach is required examining both exposure and disease - related endpoints .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None