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To investigate the actions of these transcription factors , both Pax3 and PAX3 - FKHR were introduced into NIH 3T3 cells , and the resultant gene expression changes were analyzed with a murine cDNA microarray containing 2 , 225 elements .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
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