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However , in vivo and in vitro studies have demonstrated that myometrial cells are also targets of the relaxant effects of nitric oxide ( NO ) .
 Chemical: nitric oxide; Chemical: NO
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: nitric oxide; Chemical: NO