TRIM21 and myositis disease: In addition, we detected other myositis-specific and myositis-associated antibodies in these patients, including 13 anti-Ro52 antibody positive (10 were anti-SRP common-positive, and 1 was anti-HMGCR common-positive), 2 anti-Ku antibody positive, and 1 anti-RNP, SAE1 and PL-12 antibody positive respective.