7049
The use of PEI to transfect human MSCs ( hMSCs ) with ephrinB2 is assessed here .
 Chemical: PEI
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: PEI 
Answer:
 Chemical: PEI