367493
After searching PubMed and the Cochrane Library " to see if there are any randomised , controlled trials " , the article stated that the " evidence on serratiopeptidase being effective for anything is not based on a firm foundation of clinical trials . "
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None