25984
Previously reported upregulation of hepatic Mdr1b P - glycoprotein in proprietary Wistar Mdr1a - knockout rats was not observed in the SAGE counterpart investigated herein .
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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