14341
Viscoelastic , injectable aggregates of micrometer - sized hydrogel particles made of multiarmed polyethylene glycol ( starPEG ) and heparin were prepared and tested for site - specific paracrine stimulation of tissue regeneration .
 Chemical: polyethylene glycol
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: polyethylene glycol