Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Dopa-responsive dystonia ?
    ### Response:
    What are the signs and symptoms of Dopa-responsive dystonia? The most common form of dopa-responsive dystonia (DRD) is autosomal dominant DRD (caused by a mutation in the GCH1 gene). This form of DRD is usually characterized by childhood-onset dystonia that may be associated with parkinsonism at an older age.
    