BTG3 and systemic lupus erythematosus: Among SLE patients, all were ANA positive, three were positive for antiribosomal P antibodies, 13 for anti-dsDNA antibodies at medium/high titer, eight for LA, three for anti-CL IgG, five for anti-β2GPI IgG, two for anti-CL IgM, and three for anti-β2GPI IgM at medium/high titer.