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Offspring of rats administered dexamethasone on days 15 and 16 gestation had a 20 % reduction in glomerular number compared with control at 6 to 9 months of age ( 22 527 + / - 509 versus 28 050 + / - 561 , P < 0 . 05 ) , which was comparable to the percent reduction in glomeruli measured at 3 weeks of age .
 dexamethasone, reduction in glomerular number
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 dexamethasone, reduction in glomerular number