25979
A larger group of genes were differentially expressed in human primary hepatocytes , however , little consistency was observed across compounds with respect to which genes produced a significant dose response making the determination of relative biological activity difficult .
 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