BTG3 and oral lichen planus: Chang et al. in 2009 stated that there was a significantly higher serum level of ANA (antinuclear antibody), antigastric parietal cell (GPCA), thyroglobulin auto-antibody (TGA), and antithyroid microsomal autoantibody (TMA) in 320 Chinese patients with OLP in comparison with 53 healthy patients (p< 0.005).[8] Some other surveys approved the result of the above-mentioned study.