10302
The size of PLA - V6K2 and PLA - EG NPs was 100 +/- 20 and 130 +/- 50nm , respectively , with polydispersity index of 1 . 04 and 1 . 14 .
 PLA, PLA
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 PLA, PLA