2962
The incidence of preneoplastic nodules and of hepatocellular carcinomas was 10 % and 37 % , respectively , in rats fed the plain choline - devoid diet , and 17 % and 30 % , in rats fed the phenobarbital - containing choline - devoid diet .
 hepatocellular carcinomas, choline, phenobarbital, choline
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 hepatocellular carcinomas, choline, phenobarbital, choline