Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) X-linked sideroblastic anemia ?
    ### Response:
    X-linked sideroblastic anemia is an inherited disorder that prevents developing red blood cells (erythroblasts) from making enough hemoglobin. People with X-linked sideroblastic anemia have mature red blood cells that are smaller than normal (microcytic) and appear pale (hypochromic) because of the shortage of hemoglobin.
    