text_1: To clarify the roles of miRNAs in erythropoiesis, four miRNAs were selected (miR-155, miR-221, miR-223, and miR-451) because their expression seems to be relevant to hematopoiesis.
text_2: In myelopoiesis, miR-223 has been shown to regulate granulocyte development in both humans and mice.