Below is an instruction from Human. Write a response.
    ### Instruction:
    Who is at risk for Peripheral Artery Disease? ?
    ### Response:
    Peripheral artery disease (P.A.D.) affects millions of people in the United States. The disease is more common in blacks than any other racial or ethnic group.The major risk factors for P.A.D. are smoking, older age, and having certain diseases or conditions.
    