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Importantly , the rational design of nanomaterials of low immunotoxicity will be discussed , focusing on synthetic nanodevices , with emphasis on both the nanoparticle - forming materials and the embedded cargoes .
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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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