25779
Materials and methods : NGF microspheres were fabricated using polyethylene glycol ( PEG ) , ovalbumin ( OVA ) , bovine serum albumin ( BSA ) or glucose as protein protectors , and poly ( lactide - co - glycolide ) ( PLGA ) or poly ( lactic acid ) ( PLA ) / PLGA blends as encapsulation materials .
 polyethylene glycol, PEG, glucose, poly ( lactide - co - glycolide ), PLGA, poly ( lactic acid ), PLA, PLGA
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 polyethylene glycol, PEG, glucose, poly ( lactide - co - glycolide ), PLGA, poly ( lactic acid ), PLA, PLGA