For citations:
Loginova EY, Korotaeva TV, Gubar EE, Korsakova YL, Nasonov EL. Difficult-to-treat psoriatic arthritis. Data from the All-Russian registry of patients with psoriatic arthritis. Sovremennaya Revmatologiya=Modern Rheumatology Journal. 2024;18(5):16-21. (In Russ.) https://doi.org/10.14412/1996-7012-2024-5-16-21