19919
The rats in UD - treated groups were given UD oils ( 2 ml / kg / day ) once a day orally for 7 days starting 3 days prior to hepatectomy operation .
 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