TRIM21 and sarcoidosis: Shi et al. in their study revealed the formation of anti-citrullinated protein antibodies (ACPA), rheumatoid factor (RF), anti-Sm antibodies, anti-Ro52, anti-Ro60, anti-SSB, anti-P0, anti-CCP, anti-β2-GP, and anti-mitochondrial antibody-M2 in sera from 152 patients with sarcoidosis [90].