7505
Erythropoietin (Epo) is essential for the later stages of erythropoiesis , acting to promote cell survival and proliferation, but its role in differentiation remains to be defined.
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Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
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