28979
Expression of key liver bile acid synthesis genes CYP7A1 and CYP8B1 were ~ 2 . 5 - fold higher with atorvastatin in both strains , but mRNA for liver bile acid export and reuptake transporters and conjugating enzymes were not unaffected .
 bile acid, atorvastatin, bile acid
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 bile acid, atorvastatin, bile acid