8513
Interestingly , when encapsulated in both nonfunctionalized and functionalized cross - linked PEG - HPA gels , MSCs showed good viability over all time periods assessed .
 Chemical: PEG - HPA
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: PEG - HPA