15304
A total of 64 papers were included in this review , of which 15 were human in vitro studies and 49 animal studies wherein 9 were in vitro and 40 in vivo .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None