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The objective of the present study was to characterize the effect of insulin plus hCG on the expression of steroidogenic enzymes ( P450scc and CYP17 ) in polycystic ovaries of rats .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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