19878
Mastoid Obliteration Using Three - Dimensional Composite Scaffolds Consisting of Polycaprolactone / beta - Tricalcium Phosphate / Collagen Nanofibers : An In Vitro and In Vivo Study .
 Chemical: Polycaprolactone; Chemical: beta - Tricalcium Phosphate
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: Polycaprolactone; Chemical: beta - Tricalcium Phosphate