23092
This study was hypothesized to investigate the antifibrotic potential of berberine against bleomycin - induced lung injury and fibrosis , a tentative animal model .
 berberine, bleomycin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 berberine, bleomycin