Open Label Study to Assess the Predictability of Early Response to Certolizumab Pegol in Patients With Rheumatoid Arthritis

Prefilled syringes containing an injectable volume of 1ml of liquid Certolizumab Pegol (CZP) for single use at a dosage strength of 200 mg/ml. Injections will be given subcutaneously. CZP 400 mg at Week 0, 2 and 4, then continued as maintenance dose of 200 mg every 2 weeks until Week 50.