Boyadzhieva, Vladimira, Nikolai Stoilov, Mariana Ivanova, and Rumen Stoilov. 2019. “Treatment of Rheumatoid Arthritis: CsDMARDS Versus BDMARDS. Prospective Study to Evaluate Disease Activity”. Revmatologiia (Bulgaria) 27 (1), 3-15. https://doi.org/10.35465/27.1.2019.pp3-15.