Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Fanconi anemia ?
    ### Response:
    Fanconi anemia is an inherited condition that affects the bone marrow, resulting in decreased production of all types of blood cells. People with this condition have lower-than-normal numbers of white blood cells, red blood cells, and platelets (cells that help the blood clot).
    