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In the present study , we explored the effect of nicotine treatment using different routes of administration in the dextran sodium sulfate ( DSS ) colitis mouse model .
 Chemical: nicotine; Chemical: sodium sulfate
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: nicotine; Chemical: sodium sulfate