The development of ringed sideroblasts in erythroid colonies by iron staining and their X-inactivation pattern were also examined .
the development of ringed sideroblasts in erythroid colonies by iron staining and their x-inactivation pattern were also examined .
O O O B-cell_type I-cell_type O B-cell_line I-cell_line O O O O O B-other_name I-other_name O O O O