Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Lucey-Driscoll syndrome ?
    ### Response:
    What causes Lucey-Driscoll syndrome? Lucey-Driscoll syndrome is caused by high levels of a bilirubin "conjugating enzyme inhibitor which is a substance that limits the ability of bilirubin to bind to an enzyme. When bilirubin does not bind efficiently, it builds up in the bloodstream.
    