We analyzed prognostic factors of response, response duration, and possible impact on survival of epoetin ␣, epoetin , or darbepoetin ␣ (DAR) with or without granulocyte colony-stimulating factor in 403 myelodysplastic syndrome (MDS) patients. Sixty-two percent (40% major and 22% minor) and 50% erythroid responses were seen, and median response dura-
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