For citations:
Pozharov I.V., Zhilyaev E.V., Ilyasova M.M., Akimova E.S., Klimenko A.A. Difficult-to-treat rheumatoid arthritis: Analysis of cohort study results. Rheumatology Science and Practice. 2025;63(4):393-400. (In Russ.) https://doi.org/10.47360/1995-4484-2025-393-400