1923
4 . Glucuronidation activity studies were performed , which demonstrated a positive correlation between enzyme activity levels and the UGT1A1 content in the liver microsomes obtained from individual human donors .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None