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Anti-CCP antibody titers (IU/ml) in patients with established rheumatological and non-rheumatological diagnoses in the cross-sectional study and in patients with very early inflammatory arthritis. WG: Wegener’s granulomatosis, SLE: systemic lupus erythematosus, AS: ankylosing spondylitis, IBD: inflammatory bowel disease, OA: osteoarthritis, RA: rheumatoid arthritis.
