6468
In this study , we evaluated low molecular weight ultrapure oligochitosans for the delivery of the pCMS - EGFP plasmid into the rat retina cells after subretinal and intravitreal administrations .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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