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The improved understanding of the functions and regulatory mechanisms of EPO in the context of wound - healing problems and ischemia / reperfusion injury , especially during flap surgery , may lead to new considerations of this growth hormone for its regular clinical application in patients .
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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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