BTG3 and systemic lupus erythematosus: Non-hematologic autoimmune comorbidities and/or high autoantibody titers were found in 6/17 (35.2%) cases (autoimmune hemolytic anemia-AHA, systemic lupus erythematous-SLE, Basedow’s disease, high-titer positivity for ANA autoantibodies, Sjögren syndrome, autoimmune polyendocrine syndrome type 2: one case each).