Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Rotor syndrome ?
    ### Response:
    What causes Rotor syndrome? Rotor syndrome is an inherited disorder caused by having mutations in both the SLCO1B1 and SLCO1B3 genes. These genes provide instructions for making proteins that are found in liver cells, where they transport bilirubin and other substances from the blood into the liver so that they can be cleared from the body.
    