L. Perebetyuk  National Pirogov Memorial Medical University, Vinnytsya Introduction. Rheumatoid arthritis (RA) is one of the most common inflammatory joint disease, with a progressing severity and high disability. It is often combined with fibromyalgia (FM), which can modify its course. The prevalence of primary FM among adults is on average 2.0-3.0 %, with prevalence of Read More …