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Six - to 9 - month old rats receiving prenatal dexamethasone on days 17 and 18 of gestation had a 17 % reduction in glomeruli ( 23 380 + / - 587 ) compared with control rats ( P < 0 . 05 ) .
 dexamethasone
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 dexamethasone