Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) iron-refractory iron deficiency anemia ?
    ### Response:
    Iron-refractory iron deficiency anemia is one of many types of anemia, which is a group of conditions characterized by a shortage of healthy red blood cells. This shortage prevents the blood from carrying an adequate supply of oxygen to the body's tissues.  Iron-refractory iron deficiency anemia results from an inadequate amount (deficiency) of iron in the bloodstream.
    