PADI4 and rheumatoid arthritis: AutoDeCRA tolDCs have been exposed to the antigens of the patients’ SF, while CreaVax-RA tolDCs have been exposed to PAD4, RA33 (heterogeneous nuclear ribonucleoprotein A2/B1 (hnRNP A2/B1)), citrullinated filaggrin and vimentin (217).