The results indicated normal complement levels (C3 0.923 g/L; C4 0.253 g/L), a positive anti-ANA (<1:512), negative anti-ds-DNA (<1:10), negative anti-Sm, and negative antiphospholipid antibodies, thereby excluding the possibility of immune thrombocytopenia resulting from increased SLE activity. This evidence concerns the gene BTG3 and systemic lupus erythematosus.