3. Have inactive disease, defined as having <= 0.5+ Vitreous Haze OR <= 0.5+ Vitreous Cell Count (SUN scale), and are receiving prednisone ≥10 mg/day (or equivalent dose of another corticosteroid) or at least 1 other systemic immunosuppressant (all systemic immunosuppressants other than corticosteroids will be discontinued 30 days prior to the first administration of the study drug on Day 0). Patients receiving combination of prednisone ≥10 mg/day and at least one other systemic immunosuppressant are also eligible in this category.