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However , nitric oxide synthase activity in striatal interneurons was increased in the Saline : METH and METH : METH animals .
 Chemical: nitric oxide; Chemical: METH; Chemical: METH; Chemical: METH
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: nitric oxide; Chemical: METH; Chemical: METH; Chemical: METH