30380
This study examined whether the FAAH inhibitor , URB597 , increases retinal ganglion cell ( RGC ) survival following optic nerve axotomy in young and aged animals .
 Chemical: retinal
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: retinal 
Answer:
 Chemical: retinal