19885
In addition , based on the results of the histological and micro - CT at 12 weeks post - surgery , the effective regeneration of bone in the PCL / beta - TCP / collagen scaffold is appeared .
 Chemical: PCL; Chemical: beta - TCP
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: PCL; Chemical: beta - TCP