A number of studies have also reported FasL gene polymorphisms associated with autoimmune conditions such as systemic lupus erythematosus in specific human populations, but others have failed to find such associations in patients with Hashimoto's thyroiditis, Graves' disease, Type I diabetes mellitus, and Sjogren's syndrome [20-25]. The gene discussed is FASLG; the disease is systemic lupus erythematosus.