Patients complete the Brief Pain Inventory Short Form (BPI-SF), the Western Ontario and McMaster Universities Osteoarthritis (WOMAC) Index, the Modified-Score for the Assessment and Quantification of Chronic Rheumatoid Affections of the Hands (M-SACRAH), the FACT-ES Trial Outcome Index, and the Omega-3-fatty acid Dietary Intake questionnaires at baseline and at 6, 12, and 24 weeks.