This included biopsies from 4 patients with DM (2 with anti-Mi2 and 2 with anti-NXP2 autoantibodies), 3 patients with anti-Jo1-positive AS, 6 patients with IMNM (4 with anti-HMGCR and 2 with anti-SRP autoantibodies), and 2 patients with IBM. The gene discussed is HMGCR; the disease is dermatomyositis.