Cross-validation of a Predictive Model of Response to Anti-TNF Alpha Based on Oxylipin Response in Rheumatoid Arthritis

"blood sample added to the standard blood test at visit Inclusion and Month 6. This project will use the TruCulture® Whole Blood Stimulation System to assess the Whole Blood Oxylipin Response (WBOR).~WBOR is the ability of patients to produce oxylipins in response to an immune stimulus. One tube is conditioned with LPS stimulant and a control tube is conditioned with no stimulant (Null)."