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And how to improve the cancer immunotherapy by finely nanocarrier ' s engineering ( nanoimmunotherapy ) was systematically illustrated with special focus on the unique pathology of tumor microenviroments and properties of immuno cells .
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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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