Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Sjgren's Syndrome ?
    ### Response:
    Sjgren's syndrome is an autoimmune disorder in which immune cells attack and destroy the glands that produce tears and saliva. Sjgren's syndrome is also associated with rheumatic disorders such as rheumatoid arthritis. The hallmark symptoms of the disorder are dry mouth and dry eyes.
    