Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Glycogen storage disease type 1B ?
    ### Response:
    Glycogen storage disease type 1B (GSD1B) is an inherited condition in which the body is unable to break down a complex sugar called glycogen. As a result, glycogen accumulates in cells throughout the body. In GSD1B, specifically, glycogen and fats build up within the liver and kidneys which can cause these organs to be enlarged and not function properly.
    