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Finally , miniaturized methods ( microchip and biosensor ) will be also discussed . With the current review , we attempt to give a wide and holistic overview of the different approaches which could be employed in the discovery of new phytoestrogens .
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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:
 None