1480
Ten-day exposure to Epo induced mature erythroblasts and red cells .
 Epo, red cells, mature erythroblasts
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 Epo, red cells, mature erythroblasts