GSTM1 and Decreased total leukocyte count: Laboratory tests conducted at the other hospital revealed leukopenia (WBC 3.31×109/L), mild anemia (Hb 105 g/L), and strong positivity for antinuclear antibodies (ANA, 1:10000), anti-Smith (+++), anti-dsDNA (+++), and anti-nRNP (++).