Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the genetic changes related to Guillain-Barr syndrome ?
    ### Response:
    Some studies show that normal variations in certain genes may be associated with an increased risk of developing Guillain-Barr syndrome; however, more research is necessary to identify and confirm associated genes. Many of the genes that may increase the risk of Guillain-Barr syndrome are involved in the immune system, and their roles in fighting infection may contribute to the development of the condition.
    