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CONCLUSION : Our findings substantiate the hypothesis that repeated NMDA receptor blockade with nonspecific , noncompetitive NMDA antagonists may lead to functional and ultra - structural alterations , particularly in the hippocampus and cingulate cortex .
 Chemical: NMDA; Chemical: NMDA
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: NMDA; Chemical: NMDA