26762
Previous work has focused on isolated granulosa cells or cultured follicles and while informative , provides confounding results due to the heterogeneous cell types present including granulosa , theca and oocytes and exposure to in vitro conditions .
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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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