Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Hashimoto's syndrome ?
    ### Response:
    What causes Hashimotos syndrome? Hashimoto's syndrome is an autoimmune disorder thought to result from a combination of genetic and environmental factors. Some of these factors have been identified, but many remain unknown. People with Hashimotos syndrome have antibodies to various thyroid antigens.
    