A material which is used to verify the performance of an assay intended to be used to evaluate a clinical specimen to diagnose, monitor or predict rheumatoid arthritis. Rheumatoid arthritis is a chronic systemic inflammatory disease with autoimmune features which may be associated with multiple factors including HLA genotype, shared epitopes, polymorphisms in several genes (e.g., SLC22A4, PTPN8, MHC2TA), hormonal and environmental factors.