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Antagonism between interleukin 3 and erythropoietin in mice with azidothymidine - induced anemia and in bone marrow endothelial cells .
 azidothymidine, anemia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 azidothymidine, anemia