Fig. 4From: Circulating secretory IgA antibodies against cyclic citrullinated peptides in early rheumatoid arthritis associate with inflammatory activity and smokingSecretory immunoglobulin A (SIgA) and immunoglobulin G (IgG) anticyclic citrullinated protein antibodies in relation to (a) shared epitope (SE) and (b) smoking in patients with early rheumatoid arthritisBack to article page