Below is an instruction from Human. Write a response.
    ### Instruction:
    Who is at risk for Restless Legs Syndrome? ?
    ### Response:
    Restless legs syndrome (RLS) affects about 515 percent of Americans. Many people who have RLS have family members with the disorder.
                
RLS can affect people of any racial or ethnic group, but the disorder is more common in people of Northern European descent.
    