RA Severity: Severity of RA will be determined using the American College of Rheumatology (ACR) response score. The ACR is a composite score based on 7 measures: 3 by an assessor (swollen joint, tender joint count and physician global status), 3 by the patient (function, pain and global status) and one acute phase measure (CRP). The ACR examination will be conducted by a rheumatologist (VB, Coinvestigator).