1812
Phenobarbital ( PB ) has a reputation for safety , and it is commonly believed that PB - related increases in serum aminotransferase levels do not indicate or predict the development of significant chronic liver disease .
 Chemical: Phenobarbital; Chemical: PB; Chemical: PB; Disease: liver disease
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: Phenobarbital; Chemical: PB; Chemical: PB; Disease: liver disease