4. If subjects are receiving concomitant allowed csDMARDs (in addition or not to MTX) the dose must be stable for at least 12 weeks prior to the Week 0 Visit (e.g., chloroquine, hydroxychloroquine, sulfasalazine, gold formulations [including auranofin, gold sodium thiomalate, and aurothioglucose] and/or leflunomide).